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Finding the Third Proportional to 12,921,930 and 20,273,544

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Solution

The third proportional to 12,921,930 and 20,273,544 is: 31,807,677.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921,930 : 20,273,544 = 20,273,544 : x
  2. Step 2: Convert to fraction form
    12,921,930/20,273,544 = 20,273,544/x
  3. Step 3: Cross multiply
    12,921,930x = 20,273,544 × 20,273,544
  4. Step 4: Simplify right side
    12,921,930x = 411,016,586,319,936
  5. Step 5: Solve for x
    x = 411,016,586,319,936/12,921,930
  6. Step 6: Final answer
    x = 31,807,677.83

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.