Rotational Motion

A force of \(-\mathrm{P} \hat{\mathrm{k}}\) acts on the origin of the coordinate system. The torque about the point \((2,-3)\) is \(\mathrm{P}(a \hat{i}+b \hat{j})\), The ratio of \(\frac{a}{b}\) is \(\frac{x}{2}\). The value of \(x\) is -