Question : If $8 : x :: x : 32$, find the positive value of $x$.
Option 1: 20
Option 2: 16
Option 3: 4
Option 4: 12
Correct Answer: 16
Solution :
Given: $8 : x :: x : 32$
⇒ $\frac{8}{x}=\frac{x}{32}$
⇒ $x^2=8\times32$
⇒ $x=16$
Hence, the correct answer is 16.
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