If a solid sphere of mass $5\mathrm{kg}$ and a disc of mass $4\mathrm{kg}$ have the same radius. Then the ratio of moment of inertia of the disc about a tangent in its plane to the moment of inertia of the sphere about its tangent will be $\frac{\mathrm{x}}{7}$. Then the value of $\mathrm{x}$ is……..