I think I got this one:

The negative for an image is 3.6 cm wide x 2.4 cm high. If a print with a width of 13.68 cm is produced from a negative, what will the size of the print be written as width x height? Solve using a proportion. Round the answer to the nearest hundredth.

My proportion:

3.6cm 13.68cm

------- = ----------

2.4cm X

3.6cm * X 13.68cm * 2.4cm

----------- = --------------------

3.6cm 3.6cm

X = 9.12cm

My answer - 13.68 cm x 9.12 cm

Thanks in advance.