Question

The value of a in 3:4 :: a: 20 is

Answer 1

Step-by-step explanation:

3 : 4 : : a : 20

3/4 = a/20 (Cross Multiplication)

4a = 3 x 20

4a = 60

a = 60/4

a = 15

Answer 2

Answer:

3:4 :: 15:20

Step-by-step explanation:

3:4 = 3/4

also 3:4 I'd in ratio with a:20

i.e. 3/4 : a/20

therefore 15:20 is the right answer as both are divisible by 5 and the ratio we get is 3/4

therefore 3:4 :: 15:20