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Finding the Fourth Proportional to 5,819.70, 8,028.59 and 3,879.86

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Solution

The fourth proportional to 5,819.70, 8,028.59 and 3,879.86 is: 5,352.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,819.70 : 8,028.59 = 3,879.86 : x
  2. Step 2: Convert to fraction form
    5,819.70/8,028.59 = 3,879.86/x
  3. Step 3: Cross multiply
    5,819.70x = 8,028.59 × 3,879.86
  4. Step 4: Simplify right side
    5,819.70x = 31,149,745.66
  5. Step 5: Solve for x
    x = 31,149,745.66/5,819.70
  6. Step 6: Final answer
    x = 5,352.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.