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Finding the Fourth Proportional to 8,589.28, 12,879.04 and 7,855.44

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Solution

The fourth proportional to 8,589.28, 12,879.04 and 7,855.44 is: 11,778.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,589.28 : 12,879.04 = 7,855.44 : x
  2. Step 2: Convert to fraction form
    8,589.28/12,879.04 = 7,855.44/x
  3. Step 3: Cross multiply
    8,589.28x = 12,879.04 × 7,855.44
  4. Step 4: Simplify right side
    8,589.28x = 101,170,525.98
  5. Step 5: Solve for x
    x = 101,170,525.98/8,589.28
  6. Step 6: Final answer
    x = 11,778.70

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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.