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