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Finding the Fourth Proportional to 8,591.44, 12,886.44 and 4,429.20

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Solution

The fourth proportional to 8,591.44, 12,886.44 and 4,429.20 is: 6,643.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,591.44 : 12,886.44 = 4,429.20 : x
  2. Step 2: Convert to fraction form
    8,591.44/12,886.44 = 4,429.20/x
  3. Step 3: Cross multiply
    8,591.44x = 12,886.44 × 4,429.20
  4. Step 4: Simplify right side
    8,591.44x = 57,076,620.05
  5. Step 5: Solve for x
    x = 57,076,620.05/8,591.44
  6. Step 6: Final answer
    x = 6,643.43

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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.