3x+ 4x +4x + 7x = 360 degree (total sum of quadrilateral)

18x = 360 degree

x = 360/18

x = 20 degree.

so, angle with ratio 3x = 3*20 = 60 degree

angle with ratio 4x = 4*20 = 80 degree

angle with ratio 4x = 4*20 = 80 degree

angle with ratio 7x = 7*20 = 140 degree