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Finding the Third Proportional to 11,487 and 13,161

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Solution

The third proportional to 11,487 and 13,161 is: 15,078.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,487 : 13,161 = 13,161 : x
  2. Step 2: Convert to fraction form
    11,487/13,161 = 13,161/x
  3. Step 3: Cross multiply
    11,487x = 13,161 × 13,161
  4. Step 4: Simplify right side
    11,487x = 173,211,921
  5. Step 5: Solve for x
    x = 173,211,921/11,487
  6. Step 6: Final answer
    x = 15,078.95

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.