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Finding the Fourth Proportional to 5,591.68, 8,391.30 and 2,128.84

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Solution

The fourth proportional to 5,591.68, 8,391.30 and 2,128.84 is: 3,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,591.68 : 8,391.30 = 2,128.84 : x
  2. Step 2: Convert to fraction form
    5,591.68/8,391.30 = 2,128.84/x
  3. Step 3: Cross multiply
    5,591.68x = 8,391.30 × 2,128.84
  4. Step 4: Simplify right side
    5,591.68x = 17,863,735.09
  5. Step 5: Solve for x
    x = 17,863,735.09/5,591.68
  6. Step 6: Final answer
    x = 3,194.70

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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.