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Finding the Third Proportional to 15,009 and 16,170

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Solution

The third proportional to 15,009 and 16,170 is: 17,420.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009 : 16,170 = 16,170 : x
  2. Step 2: Convert to fraction form
    15,009/16,170 = 16,170/x
  3. Step 3: Cross multiply
    15,009x = 16,170 × 16,170
  4. Step 4: Simplify right side
    15,009x = 261,468,900
  5. Step 5: Solve for x
    x = 261,468,900/15,009
  6. Step 6: Final answer
    x = 17,420.81

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.