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Finding the Third Proportional to 11,690 and 18,110

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Solution

The third proportional to 11,690 and 18,110 is: 28,055.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,690 : 18,110 = 18,110 : x
  2. Step 2: Convert to fraction form
    11,690/18,110 = 18,110/x
  3. Step 3: Cross multiply
    11,690x = 18,110 × 18,110
  4. Step 4: Simplify right side
    11,690x = 327,972,100
  5. Step 5: Solve for x
    x = 327,972,100/11,690
  6. Step 6: Final answer
    x = 28,055.78

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.