Question
Find the valueof x if 5 : 3 :: x : 6.

Answer

5 : 3 :: x : 6
$\because\text{ad}=\text{bc}$
$\therefore5\times6=3\times\text{x}$
$\Rightarrow\text{x}=\frac{5\times6}{3}=10$
$\therefore\text{x}=10$

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