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Finding the Third Proportional to 21,789 and 44,172

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Solution

The third proportional to 21,789 and 44,172 is: 89,548.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789 : 44,172 = 44,172 : x
  2. Step 2: Convert to fraction form
    21,789/44,172 = 44,172/x
  3. Step 3: Cross multiply
    21,789x = 44,172 × 44,172
  4. Step 4: Simplify right side
    21,789x = 1,951,165,584
  5. Step 5: Solve for x
    x = 1,951,165,584/21,789
  6. Step 6: Final answer
    x = 89,548.19

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.