# Page-5 of Ratio & Proportion

# The fourth proportional to 0.12, 0.21, 8 is:

The fourth proportional to 0.12, 0.21, 8 is: [A]8.9 [B]14 [C]17 [D]56 Show Answer 14 Let the fourth proportional be x. Then, Hence option [B] is the right answer.

# If A : B = 3 : 4, B : C = 5 : 7 and C : D = 8 : 9 then A : D is equal to:

If A : B = 3 : 4, B : C = 5 : 7 and C : D = 8 : 9 then A : D is equal to [A]10 : 21 [B]21 : 10 [C]3 : 7 [D]7 : 3 Show Answer 10 : 21 Hence option [A] is the right answer.

# If m : n = 3 : 2, then (4m + 5n) : (4m – 5n) is equal to:

If m : n = 3 : 2, then (4m + 5n) : (4m – 5n) is equal to: [A]9 : 1 [B]11 : 1 [C]4 : 9 [D]9 : 4 Show Answer 11 : 1 Given, Hence option [B] is the right answer.

# Aptitude Question ID : 93525

The ratio is the same as: [A]3 : 2 [B]3 : 1 [C]2 : 1 [D]6 : 1 Show Answer 2 : 1 Required ratio = Hence option [C] is the right answer.

# Aptitude Question ID : 93523

If x : y = 3 : 1, then [A]11 : 10 [B]13 : 14 [C]14 : 13 [D]10 : 11 Show Answer 13 : 14 Hence option [B] is the right answer.