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Finding the Third Proportional to 20,904 and 28,395

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Solution

The third proportional to 20,904 and 28,395 is: 38,570.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904 : 28,395 = 28,395 : x
  2. Step 2: Convert to fraction form
    20,904/28,395 = 28,395/x
  3. Step 3: Cross multiply
    20,904x = 28,395 × 28,395
  4. Step 4: Simplify right side
    20,904x = 806,276,025
  5. Step 5: Solve for x
    x = 806,276,025/20,904
  6. Step 6: Final answer
    x = 38,570.42

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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.