← Ratio and proportion lesson New set →

Ratio and Proportion Worksheet

Quantitative aptitude lesson 8: Ratio and proportion · Set 736 · 40 questions
TalentJR

The method (One part): Divide in a ratio a : b: one part = total ÷ (a + b); shares are a parts and b parts. If you know one share, one part = that share ÷ its number of parts. Proportion a : b = c : d means a × d = b × c (fourth proportional d = b × c ÷ a; third proportional to a and b is b × b ÷ a).

NameDateTime takenScore ___ / 40
  1. 1.The ratio of boys to girls in a class is 4 : 1. There are 16 boys. How many girls are there?
  2. 2.The ratio of boys to girls in a class is 3 : 5. There are 15 boys. How many girls are there?
  3. 3.The ratio of boys to girls in a class is 8 : 5. There are 80 boys. How many girls are there?
  4. 4.The ratio of boys to girls in a class is 4 : 3. There are 8 boys. How many girls are there?
  5. 5.The ratio of boys to girls in a class is 6 : 1. There are 12 boys. How many girls are there?
  6. 6.Find the third proportional to 7 and 28 (that is, 7 : 28 = 28 : ?).
  7. 7.Find the third proportional to 4 and 20 (that is, 4 : 20 = 20 : ?).
  8. 8.7 : 4 = 56 : ?
  9. 9.The ratio of boys to girls in a class is 6 : 5. There are 36 boys. How many girls are there?
  10. 10.Find the third proportional to 7 and 35 (that is, 7 : 35 = 35 : ?).
  11. 11.The ratio of boys to girls in a class is 8 : 9. There are 56 boys. How many girls are there?
  12. 12.Divide ₹231 between Meera and Aarav in the ratio 4 : 7. How much does Aarav get (in ₹)?
  13. 13.9 : 8 = 45 : ?
  14. 14.The ratio of boys to girls in a class is 9 : 4. There are 81 boys. How many girls are there?
  15. 15.5 : 8 = 20 : ?
  16. 16.8 : 9 = 48 : ?
  17. 17.Find the third proportional to 2 and 10 (that is, 2 : 10 = 10 : ?).
  18. 18.The ratio of boys to girls in a class is 8 : 3. There are 40 boys. How many girls are there?
  19. 19.Divide ₹92 between Rohan and Farhan in the ratio 3 : 1. How much does Farhan get (in ₹)?
  20. 20.Find the third proportional to 4 and 12 (that is, 4 : 12 = 12 : ?).
  21. 21.The ratio of boys to girls in a class is 5 : 8. There are 25 boys. How many girls are there?
  22. 22.5 : 3 = 20 : ?
  23. 23.7 : 2 = 42 : ?
  24. 24.The ratio of boys to girls in a class is 1 : 6. There are 5 boys. How many girls are there?
  25. 25.3 : 13 = 18 : ?
  26. 26.Find the third proportional to 3 and 9 (that is, 3 : 9 = 9 : ?).
  27. 27.Find the third proportional to 7 and 14 (that is, 7 : 14 = 14 : ?).
  28. 28.Divide ₹252 between Dev and Saanvi in the ratio 5 : 2. How much does Saanvi get (in ₹)?
  29. 29.4 : 8 = 36 : ?
  30. 30.Find the third proportional to 6 and 18 (that is, 6 : 18 = 18 : ?).
  31. 31.The ratio of boys to girls in a class is 3 : 2. There are 15 boys. How many girls are there?
  32. 32.Find the third proportional to 9 and 27 (that is, 9 : 27 = 27 : ?).
  33. 33.7 : 15 = 28 : ?
  34. 34.The ratio of boys to girls in a class is 9 : 5. There are 72 boys. How many girls are there?
  35. 35.8 : 12 = 16 : ?
  36. 36.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).
  37. 37.Divide ₹360 between Ishaan and Pooja in the ratio 3 : 7. How much does Ishaan get (in ₹)?
  38. 38.The ratio of boys to girls in a class is 5 : 1. There are 30 boys. How many girls are there?
  39. 39.4 : 12 = 20 : ?
  40. 40.The ratio of boys to girls in a class is 2 : 5. There are 10 boys. How many girls are there?

Answer key

  1. 4
  2. 25
  3. 50
  4. 6
  5. 2
  6. 112
  7. 100
  8. 32
  9. 30
  10. 175
  11. 63
  12. 147
  13. 40
  14. 36
  15. 32
  16. 54
  17. 50
  18. 15
  19. 23
  20. 36
  21. 40
  22. 12
  23. 12
  24. 30
  25. 78
  26. 27
  27. 28
  28. 72
  29. 72
  30. 54
  31. 10
  32. 81
  33. 60
  34. 40
  35. 24
  36. 32
  37. 108
  38. 6
  39. 60
  40. 25

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude