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Ratio and Proportion — Mathematics STD 10 — Question

ICSE BoardEnglish MediumSTD 10MathematicsRatio and Proportion2 Marks
Question
Find the third proportional to Rs. 3, Rs. 12
✓

Answer

Let $x$ be the third proportional to Rs. 3 and Rs. 12 then Rs. 3 : Rs. 12 : : Rs. 12 : x
$
\begin{aligned}
& \therefore x =\frac{12 \times 12}{3} \\
& =48 \\
& \therefore \text { Third proportional = Rs. } 48 .
\end{aligned}
$

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