Respuesta :

36.4 would be your answer likely

Let the number be x.

Given,

[tex] \frac{12}{x} = \frac{1}{3}x [/tex]

[tex] \frac{1}{3} x^{2} = 12[/tex]

[tex] x^{2} = 12 * 3 = 36[/tex]

[tex]x = \sqrt{36}[/tex] = 6

Hence, the answer is 6.