Question

The third proportional to 15 and 20 is

Answer 1

Answer:

Let the third proportional to 15 and 20 be x. Then, the fourth proportional to 15,20, 20 is x.

According to the question,

=15:20 :: 20:x

=Product of extremes=Product of means

=15× x= 20×20

=15x=400

=x=400/15

=x=26.66.

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