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Finding the Fourth Proportional to 8,509.32, 12,761.12 and 3,578.04

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Solution

The fourth proportional to 8,509.32, 12,761.12 and 3,578.04 is: 5,365.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,509.32 : 12,761.12 = 3,578.04 : x
  2. Step 2: Convert to fraction form
    8,509.32/12,761.12 = 3,578.04/x
  3. Step 3: Cross multiply
    8,509.32x = 12,761.12 × 3,578.04
  4. Step 4: Simplify right side
    8,509.32x = 45,659,797.80
  5. Step 5: Solve for x
    x = 45,659,797.80/8,509.32
  6. Step 6: Final answer
    x = 5,365.86

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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.