V=(1/[4*pi*(epsilon naught)])*(Q/r) <-- outside of the shell

V=(1/[4*pi*(epsilon naught)])*(3Q/2R) <-- inside the shell

I tried to figure out Q knowing the electrostatic potential and radius of the shell by plugging those numbers into the second equation. I then took the calculated charge and plugged it into the first equation for a point outside of the shell to determine V, but my answer is wrong. I'm not sure what I need to do.