To make 6 glasses of lemonade, Karla uses 1/2 cup of sugar, 1/2 cup of lemon juice, and 51/2 cup of water. If Karla wants to make 10 glasses of lemonade, which proportion can she use to determine how many cups of water, w, she will need?

lemonade         sugar.          lemon juice        water6 glasses...........1/2.................1/2................51/210 glasses.........x.....................y...................zx=(10*1/2)/6x=10/2/6x=5/6 sugary=x=5/6 lemon juicez=(51/2*10)/6z=(510/2)/6z=255/6  water