Home / 2,739.87-4,105.90-2,120.67

Finding the Fourth Proportional to 2,739.87, 4,105.90 and 2,120.67

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Solution

The fourth proportional to 2,739.87, 4,105.90 and 2,120.67 is: 3,177.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.87 : 4,105.90 = 2,120.67 : x
  2. Step 2: Convert to fraction form
    2,739.87/4,105.90 = 2,120.67/x
  3. Step 3: Cross multiply
    2,739.87x = 4,105.90 × 2,120.67
  4. Step 4: Simplify right side
    2,739.87x = 8,707,253.65
  5. Step 5: Solve for x
    x = 8,707,253.65/2,739.87
  6. Step 6: Final answer
    x = 3,177.98

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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.