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Finding the Fourth Proportional to 8,766.64, 13,142.14 and 3,218.71

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Solution

The fourth proportional to 8,766.64, 13,142.14 and 3,218.71 is: 4,825.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,766.64 : 13,142.14 = 3,218.71 : x
  2. Step 2: Convert to fraction form
    8,766.64/13,142.14 = 3,218.71/x
  3. Step 3: Cross multiply
    8,766.64x = 13,142.14 × 3,218.71
  4. Step 4: Simplify right side
    8,766.64x = 42,300,737.44
  5. Step 5: Solve for x
    x = 42,300,737.44/8,766.64
  6. Step 6: Final answer
    x = 4,825.19

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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.