Cross Ratio Geometry: Advances for Multiple Collinear Points in the Desargues Affine

This paper introduces advances in the geometry of the cross ratio of multiple collinear points of a skew field in the Desargues affine plane. This paper extends earlier results for three collinear points in terms of the geometry resulting from four collinear points in the Desargues affine plane. The results given here have a clean rendition, based on Desargues affine plane axiomatic's, skew field properties and the addition and multiplication of planar collinear points.