| Nominativ | inproportionabilis, inproportionabile | inproportionabilia, inproportionabiles |
| Genitiv | inproportionabilis | inproportionabilium, inproportionabilum |
| Dativ | inproportionabili | inproportionabilibus |
| Akkusativ | inproportionabile, inproportionabilem | inproportionabiles, inproportionabilia, inproportionabilis |
| Ablativ | inproportionabili, inproportionabile | inproportionabilibus |
| Vokativ | inproportionabilis, inproportionabile | inproportionabiles, inproportionabilia |
