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Finding the Fourth Proportional to 8,963.12, 13,442.86 and 5,629.88

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Solution

The fourth proportional to 8,963.12, 13,442.86 and 5,629.88 is: 8,443.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,963.12 : 13,442.86 = 5,629.88 : x
  2. Step 2: Convert to fraction form
    8,963.12/13,442.86 = 5,629.88/x
  3. Step 3: Cross multiply
    8,963.12x = 13,442.86 × 5,629.88
  4. Step 4: Simplify right side
    8,963.12x = 75,681,688.66
  5. Step 5: Solve for x
    x = 75,681,688.66/8,963.12
  6. Step 6: Final answer
    x = 8,443.68

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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.