A computer simulation models transverse periodic waves propagating along a stretched cylindrical wire. In Trial 1, a wire of radius \(r_1\) is held under tension \(F_1\) and driven at frequency \(f_1\), producing waves with wavelength \(\lambda_1\). In Trial 2, the wire is replaced with a wire made of the same material but with radius \(r_2 = 2r_1\). The tension is increased to \(F_2 = 9F_1\), and the driving frequency is set to \(f_2 = 3f_1\). What is the ratio \(\lambda_2 / \lambda_1\) of the wavelength in Trial 2 to the wavelength in Trial 1?