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Finding the Fourth Proportional to 18,372.80, 25,353.60 and 10,414.40

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Solution

The fourth proportional to 18,372.80, 25,353.60 and 10,414.40 is: 14,371.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.80 : 25,353.60 = 10,414.40 : x
  2. Step 2: Convert to fraction form
    18,372.80/25,353.60 = 10,414.40/x
  3. Step 3: Cross multiply
    18,372.80x = 25,353.60 × 10,414.40
  4. Step 4: Simplify right side
    18,372.80x = 264,042,531.84
  5. Step 5: Solve for x
    x = 264,042,531.84/18,372.80
  6. Step 6: Final answer
    x = 14,371.38

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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.