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Finding the Third Proportional to 15,800 and 21,394

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Solution

The third proportional to 15,800 and 21,394 is: 28,968.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,800 : 21,394 = 21,394 : x
  2. Step 2: Convert to fraction form
    15,800/21,394 = 21,394/x
  3. Step 3: Cross multiply
    15,800x = 21,394 × 21,394
  4. Step 4: Simplify right side
    15,800x = 457,703,236
  5. Step 5: Solve for x
    x = 457,703,236/15,800
  6. Step 6: Final answer
    x = 28,968.56

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.