The guitar is to the ukulele as the violin is to the cello

Not true, and you have the sizes backwards.

Yep. And the banjo is to the zither as the piano is to the harpsichord.
And the accordion is to the concertina as a bellows organ is to the bagpipes.

Violin is to viola as viola is to cello as cello is to bass

As the large pizza is to the small pizza!

or what sausage is to burger

As the grand piano is to the harp.

???