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Finding the Third Proportional to 18,905 and 39,366

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Solution

The third proportional to 18,905 and 39,366 is: 81,972.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905 : 39,366 = 39,366 : x
  2. Step 2: Convert to fraction form
    18,905/39,366 = 39,366/x
  3. Step 3: Cross multiply
    18,905x = 39,366 × 39,366
  4. Step 4: Simplify right side
    18,905x = 1,549,681,956
  5. Step 5: Solve for x
    x = 1,549,681,956/18,905
  6. Step 6: Final answer
    x = 81,972.07

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.