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Finding the Third Proportional to 15,009 and 20,136

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Solution

The third proportional to 15,009 and 20,136 is: 27,014.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009 : 20,136 = 20,136 : x
  2. Step 2: Convert to fraction form
    15,009/20,136 = 20,136/x
  3. Step 3: Cross multiply
    15,009x = 20,136 × 20,136
  4. Step 4: Simplify right side
    15,009x = 405,458,496
  5. Step 5: Solve for x
    x = 405,458,496/15,009
  6. Step 6: Final answer
    x = 27,014.36

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.