A(5,2,1), B(9,10,13), dan AB : AP = 4:1.​

P = 1b + 3a/1+3

= 1(9,10,13) + 3(5,2,1)/4

= (9,10,13) + (15,6,3) / 4

= (24,16,16)/4

= (6,4,4)

Jadi koordinat titik P = (6,4,4)