Find the third proportional to first 36 and 18
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Answer:Let the required third proportional be x
∴ 36, 18, x are in continued proportion
⇒ 36 : 18 = 18 : x
⇒ 36x = 18 × 18
⇒ x = (18 × 18)/36
⇒ x = 9
∴ Required proportional = 9
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Answer:
Let x be the third proportional
Product of means = Product of extremes
36 : x :: x : 18
x^2 = 36 × 18
x^2 = 648
x = √648
x = 25.45
Third proportional = 25.45
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