[en] The conditions for the saturation of superconverging sum rules for invariant amplitudes of the electroproduction of pions on nucleons in dependence on the 4-momentum transfer squared of a virtual photon were investigated. By using the dependence of sum rules on the value of a series of ratios was obtained between the excitation amplitudes of different nucleon resonances assuming that the contributions from the high-energy range and the nonresonance background can be neglected. Restricting themselves to the first nucleon resonance, for the ratio of the multipole amplitudes it is found the expression which agrees with the experimental data available