Question

Find thr third proportional of 15 and 20

Answer 1

${ Hey dear }$


Here is your answer

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Let the third proportional be x


Then 15 and 20 are x in proportion


This means 15 :20 = 20 : x


so, 15 * x = 20 * 20

15x = 400

x = 400 / 15

x = 26.6


Hence fourth proportional of 15 and 20 is 26.6

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