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Finding the Third Proportional to 12,979,894 and 20,177,809

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Solution

The third proportional to 12,979,894 and 20,177,809 is: 31,367,280.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979,894 : 20,177,809 = 20,177,809 : x
  2. Step 2: Convert to fraction form
    12,979,894/20,177,809 = 20,177,809/x
  3. Step 3: Cross multiply
    12,979,894x = 20,177,809 × 20,177,809
  4. Step 4: Simplify right side
    12,979,894x = 407,143,976,040,481
  5. Step 5: Solve for x
    x = 407,143,976,040,481/12,979,894
  6. Step 6: Final answer
    x = 31,367,280.51

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.