If 3.5 : 17.4 :: 14 : x, find the value of x.

Correct option is C

Given:

Proportion 3.5 : 17.4 :: 14 : x

Concept Used:

In a proportion a : b :: c : d,

​$$\dfrac{a}{b}=\dfrac{c}{d}$$​$$\implies d=\dfrac{bc}{a}$$​​

Solution:
x$$=\frac{17.4 \times 14}{3.5}$$​​
=69.6