The ratios are .
(Write the proportion)
(Form cross products)
(Multiply: )
The ratios does not form a proportion.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=28031511f609ea4c4dda73b36f732e89.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=76b19c754e63ad350f979baadc2bfedb.png\")
(Write the proportion) ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=09220ce61c8b9b4639acab337d98ba92.png\")
(Form cross products) ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f3ad38dbf6cef4ab0538912ef9dfc35c.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3405a251315fc08663cd49492db4b6dc.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")