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Finding the Third Proportional to 13,420,379 and 20,653,721

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Solution

The third proportional to 13,420,379 and 20,653,721 is: 31,785,703.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420,379 : 20,653,721 = 20,653,721 : x
  2. Step 2: Convert to fraction form
    13,420,379/20,653,721 = 20,653,721/x
  3. Step 3: Cross multiply
    13,420,379x = 20,653,721 × 20,653,721
  4. Step 4: Simplify right side
    13,420,379x = 426,576,191,145,841
  5. Step 5: Solve for x
    x = 426,576,191,145,841/13,420,379
  6. Step 6: Final answer
    x = 31,785,703.75

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.