How to determine the unknown chloride?

A lab was done to determine an unknown chloride. Apparently it is easiest to determine the unknown using a volumetric titration. We used (M Ag+) * (V Ag+) = (M Cl-) * (V Cl-) to determine the unknown concentration and we titrated AgNO3 w/ an unknown and used Ag2CrO4 as an indicator. My question is w/ the chloride ion concentration, how would you go about finding the unknown? Does it involve Ksp calculations?