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Finding the Fourth Proportional to 18,399.44, 25,391.88 and 10,442

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Solution

The fourth proportional to 18,399.44, 25,391.88 and 10,442 is: 14,410.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399.44 : 25,391.88 = 10,442 : x
  2. Step 2: Convert to fraction form
    18,399.44/25,391.88 = 10,442/x
  3. Step 3: Cross multiply
    18,399.44x = 25,391.88 × 10,442
  4. Step 4: Simplify right side
    18,399.44x = 265,142,010.96
  5. Step 5: Solve for x
    x = 265,142,010.96/18,399.44
  6. Step 6: Final answer
    x = 14,410.33

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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.