Two blocks on a frictionless table, A and B, are connected by a massless string. When block \(A\) is pulled with a certain force, dragging block B, the tension in the string is \(24 \mathrm{~N}\). When block B is pulled by the same force, dragging block A, the tension is \(18 \mathrm{~N}\). What is the ratio \(m_{\mathrm{A}} / m_{\mathrm{B}}\) of the blocks' masses?