MATLAB: Expansion on the Devision of matrix by matrix Q

matrix array

Can I expand on this,
x = [4; 8; 12; 16; 20];y = [2 4];Qa = bsxfun(@rdivide,x,y);
Returns Qa = [2 1; 4 2; 6 3; 8 4; 10 5]
Now if I
Qb = Qa*y;
I don't get four columns but an error. Is there a way to step through each column of 'Qa' and multiply by each entry in 'y'.
Function_Matrix_out = [Qa.series1, x, Qa.series2];
bsxfun(@times, kron(Qa,[1 1]), kron([1 1],y))
bsxfun(@times, kron([1 1],Qa), kron(y,[1 1]))