14 : If a, b, c, d are in proportion, then - Vidyadip

MCQ

$14$ : If $a, b, c, d$ are in proportion, then

A
$ab = cd$
B
$ac = bd$
✓
$ad = bc$
D
None of these.

✓

Answer

Correct option: C.

$ad = bc$

$\because a, b, c$ and $d$ are in proportion,
$\therefore$ $a : b = c : d$
$\Rightarrow ab = cd$
$\Rightarrow ad = bc$

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