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Finding the Third Proportional to 18,729 and 40,371

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Solution

The third proportional to 18,729 and 40,371 is: 87,021.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,729 : 40,371 = 40,371 : x
  2. Step 2: Convert to fraction form
    18,729/40,371 = 40,371/x
  3. Step 3: Cross multiply
    18,729x = 40,371 × 40,371
  4. Step 4: Simplify right side
    18,729x = 1,629,817,641
  5. Step 5: Solve for x
    x = 1,629,817,641/18,729
  6. Step 6: Final answer
    x = 87,021.07

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.