Home / 3,898.06-5,379.30-2,129.68

Finding the Fourth Proportional to 3,898.06, 5,379.30 and 2,129.68

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Solution

The fourth proportional to 3,898.06, 5,379.30 and 2,129.68 is: 2,938.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.06 : 5,379.30 = 2,129.68 : x
  2. Step 2: Convert to fraction form
    3,898.06/5,379.30 = 2,129.68/x
  3. Step 3: Cross multiply
    3,898.06x = 5,379.30 × 2,129.68
  4. Step 4: Simplify right side
    3,898.06x = 11,456,187.62
  5. Step 5: Solve for x
    x = 11,456,187.62/3,898.06
  6. Step 6: Final answer
    x = 2,938.95

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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.