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Finding the Third Proportional to 8,815 and 18,539

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Solution

The third proportional to 8,815 and 18,539 is: 38,989.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815 : 18,539 = 18,539 : x
  2. Step 2: Convert to fraction form
    8,815/18,539 = 18,539/x
  3. Step 3: Cross multiply
    8,815x = 18,539 × 18,539
  4. Step 4: Simplify right side
    8,815x = 343,694,521
  5. Step 5: Solve for x
    x = 343,694,521/8,815
  6. Step 6: Final answer
    x = 38,989.74

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.