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Finding the Fourth Proportional to 25,855.92, 38,787.36 and 8,321.52

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Solution

The fourth proportional to 25,855.92, 38,787.36 and 8,321.52 is: 12,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,855.92 : 38,787.36 = 8,321.52 : x
  2. Step 2: Convert to fraction form
    25,855.92/38,787.36 = 8,321.52/x
  3. Step 3: Cross multiply
    25,855.92x = 38,787.36 × 8,321.52
  4. Step 4: Simplify right side
    25,855.92x = 322,769,791.99
  5. Step 5: Solve for x
    x = 322,769,791.99/25,855.92
  6. Step 6: Final answer
    x = 12,483.40

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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.