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Finding the Third Proportional to 10,005 and 15,009

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Solution

The third proportional to 10,005 and 15,009 is: 22,515.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,005 : 15,009 = 15,009 : x
  2. Step 2: Convert to fraction form
    10,005/15,009 = 15,009/x
  3. Step 3: Cross multiply
    10,005x = 15,009 × 15,009
  4. Step 4: Simplify right side
    10,005x = 225,270,081
  5. Step 5: Solve for x
    x = 225,270,081/10,005
  6. Step 6: Final answer
    x = 22,515.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.