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Finding the Third Proportional to 18,729 and 40,914

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Solution

The third proportional to 18,729 and 40,914 is: 89,377.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,729 : 40,914 = 40,914 : x
  2. Step 2: Convert to fraction form
    18,729/40,914 = 40,914/x
  3. Step 3: Cross multiply
    18,729x = 40,914 × 40,914
  4. Step 4: Simplify right side
    18,729x = 1,673,955,396
  5. Step 5: Solve for x
    x = 1,673,955,396/18,729
  6. Step 6: Final answer
    x = 89,377.72

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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.