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Finding the Fourth Proportional to 8,584.52, 12,879.70 and 5,418.28

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Solution

The fourth proportional to 8,584.52, 12,879.70 and 5,418.28 is: 8,129.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,584.52 : 12,879.70 = 5,418.28 : x
  2. Step 2: Convert to fraction form
    8,584.52/12,879.70 = 5,418.28/x
  3. Step 3: Cross multiply
    8,584.52x = 12,879.70 × 5,418.28
  4. Step 4: Simplify right side
    8,584.52x = 69,785,824.72
  5. Step 5: Solve for x
    x = 69,785,824.72/8,584.52
  6. Step 6: Final answer
    x = 8,129.26

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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.