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Finding the Fourth Proportional to 8,794.20, 12,135.72 and 4,815.24

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Solution

The fourth proportional to 8,794.20, 12,135.72 and 4,815.24 is: 6,644.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,794.20 : 12,135.72 = 4,815.24 : x
  2. Step 2: Convert to fraction form
    8,794.20/12,135.72 = 4,815.24/x
  3. Step 3: Cross multiply
    8,794.20x = 12,135.72 × 4,815.24
  4. Step 4: Simplify right side
    8,794.20x = 58,436,404.37
  5. Step 5: Solve for x
    x = 58,436,404.37/8,794.20
  6. Step 6: Final answer
    x = 6,644.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.