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Finding the Third Proportional to 18,609.75 and 20,614.50

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Solution

The third proportional to 18,609.75 and 20,614.50 is: 22,835.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,609.75 : 20,614.50 = 20,614.50 : x
  2. Step 2: Convert to fraction form
    18,609.75/20,614.50 = 20,614.50/x
  3. Step 3: Cross multiply
    18,609.75x = 20,614.50 × 20,614.50
  4. Step 4: Simplify right side
    18,609.75x = 424,957,610.25
  5. Step 5: Solve for x
    x = 424,957,610.25/18,609.75
  6. Step 6: Final answer
    x = 22,835.21

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.