Finding the Fourth Proportional to 20,756,820.75, 31,135,342.29 and 13,613,589.09
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Solution
The fourth proportional to 20,756,820.75, 31,135,342.29 and 13,613,589.09 is: 20,420,456.54
Step by Step Solution
- Step 1: Write the proportion equation
20,756,820.75 : 31,135,342.29 = 13,613,589.09 : x - Step 2: Convert to fraction form
20,756,820.75/31,135,342.29 = 13,613,589.09/x - Step 3: Cross multiply
20,756,820.75x = 31,135,342.29 × 13,613,589.09 - Step 4: Simplify right side
20,756,820.75x = 423,863,756,112,559.62 - Step 5: Solve for x
x = 423,863,756,112,559.62/20,756,820.75 - Step 6: Final answer
x = 20,420,456.54
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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.