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Finding the Third Proportional to 12,979,836 and 20,177,721

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Solution

The third proportional to 12,979,836 and 20,177,721 is: 31,367,147.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979,836 : 20,177,721 = 20,177,721 : x
  2. Step 2: Convert to fraction form
    12,979,836/20,177,721 = 20,177,721/x
  3. Step 3: Cross multiply
    12,979,836x = 20,177,721 × 20,177,721
  4. Step 4: Simplify right side
    12,979,836x = 407,140,424,753,841
  5. Step 5: Solve for x
    x = 407,140,424,753,841/12,979,836
  6. Step 6: Final answer
    x = 31,367,147.07

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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.