A salt solution was made by mixing 4 pounds of salt with 10 gallons of water. At this rate, how many pounds of salt are required for 15 gallons of water?
ratio and proportion the rate is 4 pounds of salt is to 10 gallons of water. and x pounds of salt is to 15 gallons of water. 4 : 10 = x : 15 10x = 60 x=6 pounds of salt.
