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Finding the Third Proportional to 21,900 and 47,436

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Solution

The third proportional to 21,900 and 47,436 is: 102,747.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900 : 47,436 = 47,436 : x
  2. Step 2: Convert to fraction form
    21,900/47,436 = 47,436/x
  3. Step 3: Cross multiply
    21,900x = 47,436 × 47,436
  4. Step 4: Simplify right side
    21,900x = 2,250,174,096
  5. Step 5: Solve for x
    x = 2,250,174,096/21,900
  6. Step 6: Final answer
    x = 102,747.68

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.