Gujarat BoardEnglish MediumSTD 7MATHSRatio and Proportion2 Marks
Question
Find the third proportional to: $8$ and $12$
✓
Answer
Let $x$ be the third proportional,
then $8 : 12 : : 12 : \text{x}$
$\Rightarrow8\times\text{x}=12\times12$
$\Rightarrow\text{x}=\frac{12\times12}{8}=18$
$\therefore$ Third proportional $= 18$
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