Finding the Fourth Proportional to 20,756,821.75, 31,135,343.79 and 13,613,590.09
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Solution
The fourth proportional to 20,756,821.75, 31,135,343.79 and 13,613,590.09 is: 20,420,458.04
Step by Step Solution
- Step 1: Write the proportion equation
20,756,821.75 : 31,135,343.79 = 13,613,590.09 : x - Step 2: Convert to fraction form
20,756,821.75/31,135,343.79 = 13,613,590.09/x - Step 3: Cross multiply
20,756,821.75x = 31,135,343.79 × 13,613,590.09 - Step 4: Simplify right side
20,756,821.75x = 423,863,807,668,287 - Step 5: Solve for x
x = 423,863,807,668,287/20,756,821.75 - Step 6: Final answer
x = 20,420,458.04
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.