wat u say makes sense. if u have a scale chords are built from it by choosing the notes int he scale and playing them together. normally this is done by stacking thirds. eg playin a note, then playing a third above that and a third above that, if you want to play your normal majour minor chords.
or stacking four thirds to get all your types of seventh chord. basically u start on any not in a scale. pick that note, skip a note, pick a note skip a note.
u end up with 1 3 5
or 1 3 5 7. if that means anythin to you.
other chords such as 9ths use other notes in the scale.
because of this it is only natural that you can see how the chords and scales fit together as they are linked. and the more complicated chord the more obvious which scale it belongs to