If 48, 96, 20, and y are in proportion, then the value of y is:

Correct option is D

Given:

Four numbers are in proportion: 48 : 96 = 20 : y

Formula Used:

​$$a : b = c : d \implies a \times d = b \times c$$​​

Solution:

48 : 96 = 20 : y 

​$$48 \times y = 96 \times 20$$​​

48y = 1920

y = $$\frac{1920}{48}$$​ = 40