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Finding the Fourth Proportional to 8,391.61, 12,591.07 and 4,230.84

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Solution

The fourth proportional to 8,391.61, 12,591.07 and 4,230.84 is: 6,348.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.61 : 12,591.07 = 4,230.84 : x
  2. Step 2: Convert to fraction form
    8,391.61/12,591.07 = 4,230.84/x
  3. Step 3: Cross multiply
    8,391.61x = 12,591.07 × 4,230.84
  4. Step 4: Simplify right side
    8,391.61x = 53,270,839.24
  5. Step 5: Solve for x
    x = 53,270,839.24/8,391.61
  6. Step 6: Final answer
    x = 6,348.11

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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.