设四个数为a,b,c,da+d=16b+c=122b=a+cc^2=bd则c=12-ba=3b-12d=28-3b得(12-b)^2=b(28-3b)得b^2-13b+36=0b=4或b=9(1)当b=4时a=0b=4c=8d=16(2)当b=9时a=15b=9c=3d=1望采纳~~~