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Finding the Third Proportional to 18,611.25 and 40,908

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Solution

The third proportional to 18,611.25 and 40,908 is: 89,916.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.25 : 40,908 = 40,908 : x
  2. Step 2: Convert to fraction form
    18,611.25/40,908 = 40,908/x
  3. Step 3: Cross multiply
    18,611.25x = 40,908 × 40,908
  4. Step 4: Simplify right side
    18,611.25x = 1,673,464,464
  5. Step 5: Solve for x
    x = 1,673,464,464/18,611.25
  6. Step 6: Final answer
    x = 89,916.82

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.