Factor a cross product to get a linear relation

Three non-zero vectors $\mathbf a$, $\mathbf b$ and $\mathbf c$ are such that $2\mathbf a\times\mathbf b=\mathbf a\times3\mathbf c$.

Find a linear relationship between $\mathbf a$, $\mathbf b$ and $\mathbf c$.