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Finding the Third Proportional to 7,672.50 and 11,949

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Solution

The third proportional to 7,672.50 and 11,949 is: 18,609.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,672.50 : 11,949 = 11,949 : x
  2. Step 2: Convert to fraction form
    7,672.50/11,949 = 11,949/x
  3. Step 3: Cross multiply
    7,672.50x = 11,949 × 11,949
  4. Step 4: Simplify right side
    7,672.50x = 142,778,601
  5. Step 5: Solve for x
    x = 142,778,601/7,672.50
  6. Step 6: Final answer
    x = 18,609.14

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.