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Finding the Fourth Proportional to 8,584.80, 12,856.80 and 4,188.12

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Solution

The fourth proportional to 8,584.80, 12,856.80 and 4,188.12 is: 6,272.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,584.80 : 12,856.80 = 4,188.12 : x
  2. Step 2: Convert to fraction form
    8,584.80/12,856.80 = 4,188.12/x
  3. Step 3: Cross multiply
    8,584.80x = 12,856.80 × 4,188.12
  4. Step 4: Simplify right side
    8,584.80x = 53,845,821.22
  5. Step 5: Solve for x
    x = 53,845,821.22/8,584.80
  6. Step 6: Final answer
    x = 6,272.23

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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.