What number should replace the question mark '?'

The correct answer is Option (4) → 24

In each row, the third and fourth numbers are the first and second numbers multiplied by the same number, so the third and fourth numbers stand in the same ratio as the first two.

• Row 1: \(7\times3=21\) and \(9\times3=27\)

• Row 2: \(4\times9=36\) and \(2\times9=18\)

• Row 3: \(9\times6=54\), so the multiplier is 6, and \(?=4\times6=24\)