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Finding the Fourth Proportional to 18,223.91, 25,141.70 and 11,138.03

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Solution

The fourth proportional to 18,223.91, 25,141.70 and 11,138.03 is: 15,366.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,223.91 : 25,141.70 = 11,138.03 : x
  2. Step 2: Convert to fraction form
    18,223.91/25,141.70 = 11,138.03/x
  3. Step 3: Cross multiply
    18,223.91x = 25,141.70 × 11,138.03
  4. Step 4: Simplify right side
    18,223.91x = 280,028,953.16
  5. Step 5: Solve for x
    x = 280,028,953.16/18,223.91
  6. Step 6: Final answer
    x = 15,366.02

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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.