Hi Waqar @wqrsl ,
Scaling is a multiplication in Blender, but if you enable the Mesh: Edit Mesh Tools Addon, you can find quite a few handy Tools (for instance Set Edge Length).
You could for instance Offset Edges and type in the exact distance. Then Scale (with Snapping) the Edge Loop to the new Vertices/Edges and M > Merge by Distance…:

Of course there are other ways. Play around a bit and have fun discovering what you can do (and forget how to do things in Sketchup, that will just hold you back.).