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Finding the Fourth Proportional to 8,963.85, 12,375.65 and 5,778.28

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Solution

The fourth proportional to 8,963.85, 12,375.65 and 5,778.28 is: 7,977.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,963.85 : 12,375.65 = 5,778.28 : x
  2. Step 2: Convert to fraction form
    8,963.85/12,375.65 = 5,778.28/x
  3. Step 3: Cross multiply
    8,963.85x = 12,375.65 × 5,778.28
  4. Step 4: Simplify right side
    8,963.85x = 71,510,000.80
  5. Step 5: Solve for x
    x = 71,510,000.80/8,963.85
  6. Step 6: Final answer
    x = 7,977.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.