Finding the Fourth Proportional to 20,686,020.68, 28,542,377.92 and 11,983,674.28
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Solution
The fourth proportional to 20,686,020.68, 28,542,377.92 and 11,983,674.28 is: 16,534,961.72
Step by Step Solution
- Step 1: Write the proportion equation
20,686,020.68 : 28,542,377.92 = 11,983,674.28 : x - Step 2: Convert to fraction form
20,686,020.68/28,542,377.92 = 11,983,674.28/x - Step 3: Cross multiply
20,686,020.68x = 28,542,377.92 × 11,983,674.28 - Step 4: Simplify right side
20,686,020.68x = 342,042,560,169,943.88 - Step 5: Solve for x
x = 342,042,560,169,943.88/20,686,020.68 - Step 6: Final answer
x = 16,534,961.72
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.