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Finding the Fourth Proportional to 25,388.78, 38,107.78 and 12,250.38

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Solution

The fourth proportional to 25,388.78, 38,107.78 and 12,250.38 is: 18,387.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,388.78 : 38,107.78 = 12,250.38 : x
  2. Step 2: Convert to fraction form
    25,388.78/38,107.78 = 12,250.38/x
  3. Step 3: Cross multiply
    25,388.78x = 38,107.78 × 12,250.38
  4. Step 4: Simplify right side
    25,388.78x = 466,834,785.96
  5. Step 5: Solve for x
    x = 466,834,785.96/25,388.78
  6. Step 6: Final answer
    x = 18,387.44

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1.5x scale

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.