Finding the Fourth Proportional to 18,090,689.40, 27,127,739.70 and 7,988,110.20
Calculator
Solution
The fourth proportional to 18,090,689.40, 27,127,739.70 and 7,988,110.20 is: 11,978,502.83
Step by Step Solution
- Step 1: Write the proportion equation
18,090,689.40 : 27,127,739.70 = 7,988,110.20 : x - Step 2: Convert to fraction form
18,090,689.40/27,127,739.70 = 7,988,110.20/x - Step 3: Cross multiply
18,090,689.40x = 27,127,739.70 × 7,988,110.20 - Step 4: Simplify right side
18,090,689.40x = 216,699,374,200,514.94 - Step 5: Solve for x
x = 216,699,374,200,514.94/18,090,689.40 - Step 6: Final answer
x = 11,978,502.83
Related Problems
Find fourth proportional to 9,045,344.70, 13,563,869.85 and 3,994,055.10
Half scale
Find fourth proportional to 36,181,378.80, 54,255,479.40 and 15,976,220.40
Double scale
Find fourth proportional to 18,090,690.40, 27,127,741.20 and 7,988,111.20
Similar ratio
Find fourth proportional to 27,136,034.10, 40,691,609.55 and 11,982,165.30
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.