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Finding the Third Proportional to 15,924 and 18,156

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Solution

The third proportional to 15,924 and 18,156 is: 20,700.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,924 : 18,156 = 18,156 : x
  2. Step 2: Convert to fraction form
    15,924/18,156 = 18,156/x
  3. Step 3: Cross multiply
    15,924x = 18,156 × 18,156
  4. Step 4: Simplify right side
    15,924x = 329,640,336
  5. Step 5: Solve for x
    x = 329,640,336/15,924
  6. Step 6: Final answer
    x = 20,700.85

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.