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Proportion (Including Word Problems) — MATHS STD 6 — Question

ICSE BoardEnglish MediumSTD 6MATHSProportion (Including Word Problems)3 Marks
Question
Are the following numbers in proportion 12, 15, 18 and 20?
✓

Answer

$12,15,18$ and 20 are in proportion
if $12: 15=18: 20$
if $12 \times 20=15 \times 18 \ldots \ldots .\left\{\frac{a}{b}=\frac{c}{d} \Rightarrow a d=b c\right\}$
if $240=270$
which is not true.
$12,15,18$ and 20 are not in proportion.

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