| Nominativ | improportionabilis, improportionabile | improportionabiles, improportionabilia |
| Genitiv | improportionabilis | improportionabilium, improportionabilum |
| Dativ | improportionabili | improportionabilibus |
| Akkusativ | improportionabile, improportionabilem | improportionabilis, improportionabiles, improportionabilia |
| Ablativ | improportionabile, improportionabili | improportionabilibus |
| Vokativ | improportionabilis, improportionabile | improportionabiles, improportionabilia |
