Home / 3,898.44-5,379.78-2,129.88

Finding the Fourth Proportional to 3,898.44, 5,379.78 and 2,129.88

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Solution

The fourth proportional to 3,898.44, 5,379.78 and 2,129.88 is: 2,939.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.44 : 5,379.78 = 2,129.88 : x
  2. Step 2: Convert to fraction form
    3,898.44/5,379.78 = 2,129.88/x
  3. Step 3: Cross multiply
    3,898.44x = 5,379.78 × 2,129.88
  4. Step 4: Simplify right side
    3,898.44x = 11,458,285.83
  5. Step 5: Solve for x
    x = 11,458,285.83/3,898.44
  6. Step 6: Final answer
    x = 2,939.20

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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.