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Finding the Third Proportional to 15,429,393 and 21,015,553

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Solution

The third proportional to 15,429,393 and 21,015,553 is: 28,624,163.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429,393 : 21,015,553 = 21,015,553 : x
  2. Step 2: Convert to fraction form
    15,429,393/21,015,553 = 21,015,553/x
  3. Step 3: Cross multiply
    15,429,393x = 21,015,553 × 21,015,553
  4. Step 4: Simplify right side
    15,429,393x = 441,653,467,895,809
  5. Step 5: Solve for x
    x = 441,653,467,895,809/15,429,393
  6. Step 6: Final answer
    x = 28,624,163.50

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.