Question

Find the value of fourth proportional 144:13::36:?

Answer 1

let it be x

$144 \times x = 13 \times 36$

$x = \frac{13 \times 36}{144}$

$x = \frac{13}{4} = 3.25$

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Answer 2

This answer is correct
Answer given at the end of chapter in your book can be wrong