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Finding the Third Proportional to 12,158 and 15,966

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Solution

The third proportional to 12,158 and 15,966 is: 20,966.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,158 : 15,966 = 15,966 : x
  2. Step 2: Convert to fraction form
    12,158/15,966 = 15,966/x
  3. Step 3: Cross multiply
    12,158x = 15,966 × 15,966
  4. Step 4: Simplify right side
    12,158x = 254,913,156
  5. Step 5: Solve for x
    x = 254,913,156/12,158
  6. Step 6: Final answer
    x = 20,966.70

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.