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Finding the Fourth Proportional to 7,260.45, 10,879.91 and 4,138.85

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Solution

The fourth proportional to 7,260.45, 10,879.91 and 4,138.85 is: 6,202.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,260.45 : 10,879.91 = 4,138.85 : x
  2. Step 2: Convert to fraction form
    7,260.45/10,879.91 = 4,138.85/x
  3. Step 3: Cross multiply
    7,260.45x = 10,879.91 × 4,138.85
  4. Step 4: Simplify right side
    7,260.45x = 45,030,315.50
  5. Step 5: Solve for x
    x = 45,030,315.50/7,260.45
  6. Step 6: Final answer
    x = 6,202.14

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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.