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Finding the Fourth Proportional to 8,591.54, 12,879.08 and 5,461.85

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Solution

The fourth proportional to 8,591.54, 12,879.08 and 5,461.85 is: 8,187.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,591.54 : 12,879.08 = 5,461.85 : x
  2. Step 2: Convert to fraction form
    8,591.54/12,879.08 = 5,461.85/x
  3. Step 3: Cross multiply
    8,591.54x = 12,879.08 × 5,461.85
  4. Step 4: Simplify right side
    8,591.54x = 70,343,603.10
  5. Step 5: Solve for x
    x = 70,343,603.10/8,591.54
  6. Step 6: Final answer
    x = 8,187.54

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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.