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Finding the Fourth Proportional to 8,651.20, 12,978.60 and 4,263.52

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Solution

The fourth proportional to 8,651.20, 12,978.60 and 4,263.52 is: 6,396.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.20 : 12,978.60 = 4,263.52 : x
  2. Step 2: Convert to fraction form
    8,651.20/12,978.60 = 4,263.52/x
  3. Step 3: Cross multiply
    8,651.20x = 12,978.60 × 4,263.52
  4. Step 4: Simplify right side
    8,651.20x = 55,334,520.67
  5. Step 5: Solve for x
    x = 55,334,520.67/8,651.20
  6. Step 6: Final answer
    x = 6,396.17

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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.