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Finding the Third Proportional to 18,129 and 38,445

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Solution

The third proportional to 18,129 and 38,445 is: 81,527.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129 : 38,445 = 38,445 : x
  2. Step 2: Convert to fraction form
    18,129/38,445 = 38,445/x
  3. Step 3: Cross multiply
    18,129x = 38,445 × 38,445
  4. Step 4: Simplify right side
    18,129x = 1,478,018,025
  5. Step 5: Solve for x
    x = 1,478,018,025/18,129
  6. Step 6: Final answer
    x = 81,527.83

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.