SOLUTION: fint the value of a in this proportions a/4=9/a

Question 317301: fint the value of a in this proportions a/4=9/a
Found 2 solutions by nyc_function, jim_thompson5910:
Answer by nyc_function(2741) (Show Source): You can put this solution on YOUR website!
a/4 = 9/a
Cross-multiply to find a.
4 * 9 = a * a
36 = a^2
sqrt{36} = sqrt{a^2}
6 = a
Done!

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation.

Cross multiply.

Multiply.

Take the square root of both sides.

or Break up the plus/minus.

or Take the square root of 36 to get 6.

So the solutions are or
RELATED QUESTIONS
fint the surface area. radius of 5 ft, and a height of 12 ft. (its a cone... (answered by Jeff Gordon)
In a certain state license plates consists of 3 digit followed by 4 letters fint the... (answered by ikleyn)
a motor boat can travel 15 miles per hour downstream and 9 miles upstream per hour on a... (answered by scott8148)
the formula for the test value in a z test for proportions is (answered by ewatrrr)
The formula for the test value in a z test for proportions is... (answered by Boreal)
fint the... (answered by Jstrasner)
If the length of a rectangle is twice its width.if the length of the diagonal of the... (answered by vic21)
how do i do this problem its a fraction x+4 OVER 4 = 9 over 7 its ratios and... (answered by Fombitz)
In a survey, the planning value for the population proportions P* = 0.5. How large a... (answered by Boreal)