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Finding the Third Proportional to 3,904 and 9,009

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Solution

The third proportional to 3,904 and 9,009 is: 20,789.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904 : 9,009 = 9,009 : x
  2. Step 2: Convert to fraction form
    3,904/9,009 = 9,009/x
  3. Step 3: Cross multiply
    3,904x = 9,009 × 9,009
  4. Step 4: Simplify right side
    3,904x = 81,162,081
  5. Step 5: Solve for x
    x = 81,162,081/3,904
  6. Step 6: Final answer
    x = 20,789.47

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.