Question : Find the third proportional to 16 and 20.
Option 1: 25
Option 2: 23
Option 3: 24
Option 4: 26
Correct Answer: 25
Solution :
Third proportional to 16 and 20 = $\frac{20^2}{16}$
= $\frac{400}{16}$
= 25
Hence, the correct answer is 25.
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