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Finding the Fourth Proportional to 8,591.28, 12,891.88 and 4,642.55

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Solution

The fourth proportional to 8,591.28, 12,891.88 and 4,642.55 is: 6,966.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,591.28 : 12,891.88 = 4,642.55 : x
  2. Step 2: Convert to fraction form
    8,591.28/12,891.88 = 4,642.55/x
  3. Step 3: Cross multiply
    8,591.28x = 12,891.88 × 4,642.55
  4. Step 4: Simplify right side
    8,591.28x = 59,851,197.49
  5. Step 5: Solve for x
    x = 59,851,197.49/8,591.28
  6. Step 6: Final answer
    x = 6,966.51

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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.