  The ALICE Collaboration has recently measured the correlations between
amplitudes of anisotropic flow in different Fourier harmonics, referred to as
symmetric cumulants. We derive approximate relations between symmetric
cumulants involving $v_4$ and $v_5$ and the event-plane correlations measured
by ATLAS. The validity of these relations is tested using event-by-event
hydrodynamic calculations. The corresponding results are in better agreement
with ALICE data than existing hydrodynamic predictions. We make quantitative
predictions for three symmetric cumulants which are not yet measured.
