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Finding the Third Proportional to 15,900 and 18,006

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Solution

The third proportional to 15,900 and 18,006 is: 20,390.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900 : 18,006 = 18,006 : x
  2. Step 2: Convert to fraction form
    15,900/18,006 = 18,006/x
  3. Step 3: Cross multiply
    15,900x = 18,006 × 18,006
  4. Step 4: Simplify right side
    15,900x = 324,216,036
  5. Step 5: Solve for x
    x = 324,216,036/15,900
  6. Step 6: Final answer
    x = 20,390.95

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.