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Finding the Third Proportional to 7,447.50 and 9,930

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Solution

The third proportional to 7,447.50 and 9,930 is: 13,240

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,447.50 : 9,930 = 9,930 : x
  2. Step 2: Convert to fraction form
    7,447.50/9,930 = 9,930/x
  3. Step 3: Cross multiply
    7,447.50x = 9,930 × 9,930
  4. Step 4: Simplify right side
    7,447.50x = 98,604,900
  5. Step 5: Solve for x
    x = 98,604,900/7,447.50
  6. Step 6: Final answer
    x = 13,240

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.