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Finding the Third Proportional to 12,139 and 18,157

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Solution

The third proportional to 12,139 and 18,157 is: 27,158.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139 : 18,157 = 18,157 : x
  2. Step 2: Convert to fraction form
    12,139/18,157 = 18,157/x
  3. Step 3: Cross multiply
    12,139x = 18,157 × 18,157
  4. Step 4: Simplify right side
    12,139x = 329,676,649
  5. Step 5: Solve for x
    x = 329,676,649/12,139
  6. Step 6: Final answer
    x = 27,158.47

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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.