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Finding the Fourth Proportional to 26,187, 36,138.06 and 15,009

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Solution

The fourth proportional to 26,187, 36,138.06 and 15,009 is: 20,712.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,187 : 36,138.06 = 15,009 : x
  2. Step 2: Convert to fraction form
    26,187/36,138.06 = 15,009/x
  3. Step 3: Cross multiply
    26,187x = 36,138.06 × 15,009
  4. Step 4: Simplify right side
    26,187x = 542,396,142.54
  5. Step 5: Solve for x
    x = 542,396,142.54/26,187
  6. Step 6: Final answer
    x = 20,712.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.