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Finding the Third Proportional to 12,979,700 and 20,177,529

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Solution

The third proportional to 12,979,700 and 20,177,529 is: 31,366,878.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979,700 : 20,177,529 = 20,177,529 : x
  2. Step 2: Convert to fraction form
    12,979,700/20,177,529 = 20,177,529/x
  3. Step 3: Cross multiply
    12,979,700x = 20,177,529 × 20,177,529
  4. Step 4: Simplify right side
    12,979,700x = 407,132,676,545,841
  5. Step 5: Solve for x
    x = 407,132,676,545,841/12,979,700
  6. Step 6: Final answer
    x = 31,366,878.78

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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.