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Finding the Fourth Proportional to 5,879.36, 8,115.36 and 3,789.12

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Solution

The fourth proportional to 5,879.36, 8,115.36 and 3,789.12 is: 5,230.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,879.36 : 8,115.36 = 3,789.12 : x
  2. Step 2: Convert to fraction form
    5,879.36/8,115.36 = 3,789.12/x
  3. Step 3: Cross multiply
    5,879.36x = 8,115.36 × 3,789.12
  4. Step 4: Simplify right side
    5,879.36x = 30,750,072.88
  5. Step 5: Solve for x
    x = 30,750,072.88/5,879.36
  6. Step 6: Final answer
    x = 5,230.17

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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.