Question

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

Answer 1

Answer:

3:4 : 15:20

Step-by-step explanation:

3:4 = 4×5 = 20 so, 3×5= 25

Answer 2

Answer:

a = 15

Step-by-step explanation:

3 : 4 : : a : 20

Product of extreme , product of mean

3×20 = 4 × a

a = 3 ×20

_____ = a = 15

4