document.write( "Question 542435: solve this proportion: a rainstorm produced a rainfall of 2 inches per hour. How many hours would it take to get a rainfall amount of one foot. \n" ); document.write( "
Algebra.Com's Answer #354567 by neatmath(302) You can put this solution on YOUR website! Given: \r \n" ); document.write( "\n" ); document.write( "2 inches per hour \r \n" ); document.write( "\n" ); document.write( "Want: \r \n" ); document.write( "\n" ); document.write( "1 foot per x hours \r \n" ); document.write( "\n" ); document.write( "Let's change the foot into inches to make it easier. Then we want \r \n" ); document.write( "\n" ); document.write( "12 inches per x hours \r \n" ); document.write( "\n" ); document.write( "From this it is fairly straightforward to see that it would need to rain for 6 hours to accumulate 12 inches of rain. \r \n" ); document.write( "\n" ); document.write( "But we can also set it up as a proportion. In other words: \r \n" ); document.write( "\n" ); document.write( "2 inches is to 1 hour as 12 inches is to x hours? \r \n" ); document.write( "\n" ); document.write( " \r \n" ); document.write( "\n" ); document.write( "Then we just need to cross multiply and solve for x: \r \n" ); document.write( "\n" ); document.write( " \r \n" ); document.write( "\n" ); document.write( " \r \n" ); document.write( "\n" ); document.write( " \r \n" ); document.write( "\n" ); document.write( "So again, it would take 6 hours to have one foot (or 12 inches) of rainfall. \r \n" ); document.write( "\n" ); document.write( "I hope this helps! \n" ); document.write( " |