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Finding the Fourth Proportional to 18,404, 25,400.40 and 10,956.32

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Solution

The fourth proportional to 18,404, 25,400.40 and 10,956.32 is: 15,121.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,404 : 25,400.40 = 10,956.32 : x
  2. Step 2: Convert to fraction form
    18,404/25,400.40 = 10,956.32/x
  3. Step 3: Cross multiply
    18,404x = 25,400.40 × 10,956.32
  4. Step 4: Simplify right side
    18,404x = 278,294,910.53
  5. Step 5: Solve for x
    x = 278,294,910.53/18,404
  6. Step 6: Final answer
    x = 15,121.44

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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.