Question

In simplest radical form, what is the mean proportional
between 4 and 12?
(1) sqrt{48} (2) 4sqrt{3} (3)3sqrt{4}
(4) 2sqrt{8}

Answer 1

let it be x
\[\frac{ x }{ 4 }=\frac{ 12 }{x }\]
\[x ^{2}=4*12=48,calculate x\]