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Finding the Third Proportional to 12,207 and 18,311

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Solution

The third proportional to 12,207 and 18,311 is: 27,467.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,207 : 18,311 = 18,311 : x
  2. Step 2: Convert to fraction form
    12,207/18,311 = 18,311/x
  3. Step 3: Cross multiply
    12,207x = 18,311 × 18,311
  4. Step 4: Simplify right side
    12,207x = 335,292,721
  5. Step 5: Solve for x
    x = 335,292,721/12,207
  6. Step 6: Final answer
    x = 27,467.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.