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Finding the Third Proportional to 18,751 and 40,790

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Solution

The third proportional to 18,751 and 40,790 is: 88,732.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751 : 40,790 = 40,790 : x
  2. Step 2: Convert to fraction form
    18,751/40,790 = 40,790/x
  3. Step 3: Cross multiply
    18,751x = 40,790 × 40,790
  4. Step 4: Simplify right side
    18,751x = 1,663,824,100
  5. Step 5: Solve for x
    x = 1,663,824,100/18,751
  6. Step 6: Final answer
    x = 88,732.55

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.