Question

for the pair of similar figures, set up a proportion in order to find the unknown.
$y = $
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Explanation:

Step1: Set up similarity proportion

$\frac{y}{4} = \frac{15}{10}$

Step2: Simplify the right-hand fraction

$\frac{y}{4} = \frac{3}{2}$

Step3: Solve for y by cross-multiplying

$y = 4 \times \frac{3}{2}$

Answer:

$6$