Finding the Fourth Proportional to 20,915,417.12, 31,378,169.40 and 7,266,576.92
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Solution
The fourth proportional to 20,915,417.12, 31,378,169.40 and 7,266,576.92 is: 10,901,617.70
Step by Step Solution
- Step 1: Write the proportion equation
20,915,417.12 : 31,378,169.40 = 7,266,576.92 : x - Step 2: Convert to fraction form
20,915,417.12/31,378,169.40 = 7,266,576.92/x - Step 3: Cross multiply
20,915,417.12x = 31,378,169.40 × 7,266,576.92 - Step 4: Simplify right side
20,915,417.12x = 228,011,881,553,890.25 - Step 5: Solve for x
x = 228,011,881,553,890.25/20,915,417.12 - Step 6: Final answer
x = 10,901,617.70
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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.