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Finding the Third Proportional to 15,930 and 18,162

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Solution

The third proportional to 15,930 and 18,162 is: 20,706.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930 : 18,162 = 18,162 : x
  2. Step 2: Convert to fraction form
    15,930/18,162 = 18,162/x
  3. Step 3: Cross multiply
    15,930x = 18,162 × 18,162
  4. Step 4: Simplify right side
    15,930x = 329,858,244
  5. Step 5: Solve for x
    x = 329,858,244/15,930
  6. Step 6: Final answer
    x = 20,706.73

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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.