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Finding the Fourth Proportional to 25,957, 38,961.42 and 18,958.60

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Solution

The fourth proportional to 25,957, 38,961.42 and 18,958.60 is: 28,456.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,957 : 38,961.42 = 18,958.60 : x
  2. Step 2: Convert to fraction form
    25,957/38,961.42 = 18,958.60/x
  3. Step 3: Cross multiply
    25,957x = 38,961.42 × 18,958.60
  4. Step 4: Simplify right side
    25,957x = 738,653,977.21
  5. Step 5: Solve for x
    x = 738,653,977.21/25,957
  6. Step 6: Final answer
    x = 28,456.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.