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Finding the Third Proportional to 18,517 and 40,111

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Solution

The third proportional to 18,517 and 40,111 is: 86,887.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,517 : 40,111 = 40,111 : x
  2. Step 2: Convert to fraction form
    18,517/40,111 = 40,111/x
  3. Step 3: Cross multiply
    18,517x = 40,111 × 40,111
  4. Step 4: Simplify right side
    18,517x = 1,608,892,321
  5. Step 5: Solve for x
    x = 1,608,892,321/18,517
  6. Step 6: Final answer
    x = 86,887.31

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.