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Finding the Fourth Proportional to 8,627.76, 12,942.27 and 2,788.56

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Solution

The fourth proportional to 8,627.76, 12,942.27 and 2,788.56 is: 4,183.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,627.76 : 12,942.27 = 2,788.56 : x
  2. Step 2: Convert to fraction form
    8,627.76/12,942.27 = 2,788.56/x
  3. Step 3: Cross multiply
    8,627.76x = 12,942.27 × 2,788.56
  4. Step 4: Simplify right side
    8,627.76x = 36,090,296.43
  5. Step 5: Solve for x
    x = 36,090,296.43/8,627.76
  6. Step 6: Final answer
    x = 4,183.04

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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.