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Finding the Fourth Proportional to 18,471.44, 25,491 and 11,018

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Solution

The fourth proportional to 18,471.44, 25,491 and 11,018 is: 15,205.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.44 : 25,491 = 11,018 : x
  2. Step 2: Convert to fraction form
    18,471.44/25,491 = 11,018/x
  3. Step 3: Cross multiply
    18,471.44x = 25,491 × 11,018
  4. Step 4: Simplify right side
    18,471.44x = 280,859,838
  5. Step 5: Solve for x
    x = 280,859,838/18,471.44
  6. Step 6: Final answer
    x = 15,205.09

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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.