Question

if 9 : a : : a : 16 then a​

Answer 1

Answer:

$\frac{9}{a} = \frac{a}{16} \\ equating \: both \: the \: sides \: \\ {a }^{2} = 9 \times 16 \\ a = 12$

Answer 2

Answer:

a= 12

a= -12

Step-by-step explanation:

9:a :: a:16

9/a = a/16

a×a = 9×16

a^2 = 144

a = (144)^1/2

a = 12 , a = -12