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Finding the Fourth Proportional to 25,656.78, 38,478.11 and 8,789.54

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Solution

The fourth proportional to 25,656.78, 38,478.11 and 8,789.54 is: 13,181.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,656.78 : 38,478.11 = 8,789.54 : x
  2. Step 2: Convert to fraction form
    25,656.78/38,478.11 = 8,789.54/x
  3. Step 3: Cross multiply
    25,656.78x = 38,478.11 × 8,789.54
  4. Step 4: Simplify right side
    25,656.78x = 338,204,886.97
  5. Step 5: Solve for x
    x = 338,204,886.97/25,656.78
  6. Step 6: Final answer
    x = 13,181.89

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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.