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Finding the Third Proportional to 18,351 and 20,308.50

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Solution

The third proportional to 18,351 and 20,308.50 is: 22,474.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,351 : 20,308.50 = 20,308.50 : x
  2. Step 2: Convert to fraction form
    18,351/20,308.50 = 20,308.50/x
  3. Step 3: Cross multiply
    18,351x = 20,308.50 × 20,308.50
  4. Step 4: Simplify right side
    18,351x = 412,435,172.25
  5. Step 5: Solve for x
    x = 412,435,172.25/18,351
  6. Step 6: Final answer
    x = 22,474.81

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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.