Areas of two concentric spheres of radii R1 and R2,
Area1=4πR21
Area2=4πR22
If we consider flux emanating from a constant source of W, then
fluxR1=W4πR21
fluxR2=W4πR22
from which we have the inverse square law.
flux∝1R2
However, if
W∝43πR3
where the volume immediately below is of concern, like space density, then
flux∝R3 as in the case of dielectric in electrostatic.
This is the case when electrons are trapped in a oil drop, a dielectric. The factor of 13 is serious. The term R may cancel in the final formulation, especially if the same droplet is swinging about, but the factor 13 does not go away no matter how you orientate the E flux.
This is how the fat electrons slimmed down.