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Finding the Third Proportional to 18,868.50 and 40,635

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Solution

The third proportional to 18,868.50 and 40,635 is: 87,511.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.50 : 40,635 = 40,635 : x
  2. Step 2: Convert to fraction form
    18,868.50/40,635 = 40,635/x
  3. Step 3: Cross multiply
    18,868.50x = 40,635 × 40,635
  4. Step 4: Simplify right side
    18,868.50x = 1,651,203,225
  5. Step 5: Solve for x
    x = 1,651,203,225/18,868.50
  6. Step 6: Final answer
    x = 87,511.10

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.