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Finding the Fourth Proportional to 8,589.52, 12,856.20 and 5,305.28

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Solution

The fourth proportional to 8,589.52, 12,856.20 and 5,305.28 is: 7,940.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,589.52 : 12,856.20 = 5,305.28 : x
  2. Step 2: Convert to fraction form
    8,589.52/12,856.20 = 5,305.28/x
  3. Step 3: Cross multiply
    8,589.52x = 12,856.20 × 5,305.28
  4. Step 4: Simplify right side
    8,589.52x = 68,205,740.74
  5. Step 5: Solve for x
    x = 68,205,740.74/8,589.52
  6. Step 6: Final answer
    x = 7,940.58

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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.