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Finding the Third Proportional to 3,900 and 9,050

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Solution

The third proportional to 3,900 and 9,050 is: 21,000.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900 : 9,050 = 9,050 : x
  2. Step 2: Convert to fraction form
    3,900/9,050 = 9,050/x
  3. Step 3: Cross multiply
    3,900x = 9,050 × 9,050
  4. Step 4: Simplify right side
    3,900x = 81,902,500
  5. Step 5: Solve for x
    x = 81,902,500/3,900
  6. Step 6: Final answer
    x = 21,000.64

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.