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Finding the Fourth Proportional to 28,468.88, 42,696.90 and 8,474.30

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Solution

The fourth proportional to 28,468.88, 42,696.90 and 8,474.30 is: 12,709.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,468.88 : 42,696.90 = 8,474.30 : x
  2. Step 2: Convert to fraction form
    28,468.88/42,696.90 = 8,474.30/x
  3. Step 3: Cross multiply
    28,468.88x = 42,696.90 × 8,474.30
  4. Step 4: Simplify right side
    28,468.88x = 361,826,339.67
  5. Step 5: Solve for x
    x = 361,826,339.67/28,468.88
  6. Step 6: Final answer
    x = 12,709.54

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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.