Are the following quantities in proportion or not?
$11, 22, 6, a n d 18$

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Solution

Step 1: Product of extreme terms $= 11 \times 18 = 198$
Product of middle terms $= 22 \times 6 = 132$
Step 2: Product of extreme terms $\neq$ Product of middle terms
No, $11, 22, 6, a n d 18$ are not in proportion.

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