Home / 3,489.12-5,239.44-2,129.76

Finding the Fourth Proportional to 3,489.12, 5,239.44 and 2,129.76

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Solution

The fourth proportional to 3,489.12, 5,239.44 and 2,129.76 is: 3,198.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.12 : 5,239.44 = 2,129.76 : x
  2. Step 2: Convert to fraction form
    3,489.12/5,239.44 = 2,129.76/x
  3. Step 3: Cross multiply
    3,489.12x = 5,239.44 × 2,129.76
  4. Step 4: Simplify right side
    3,489.12x = 11,158,749.73
  5. Step 5: Solve for x
    x = 11,158,749.73/3,489.12
  6. Step 6: Final answer
    x = 3,198.16

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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.