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