Home / 3,917.76-5,406.36-2,239.08

Finding the Fourth Proportional to 3,917.76, 5,406.36 and 2,239.08

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Solution

The fourth proportional to 3,917.76, 5,406.36 and 2,239.08 is: 3,089.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.76 : 5,406.36 = 2,239.08 : x
  2. Step 2: Convert to fraction form
    3,917.76/5,406.36 = 2,239.08/x
  3. Step 3: Cross multiply
    3,917.76x = 5,406.36 × 2,239.08
  4. Step 4: Simplify right side
    3,917.76x = 12,105,272.55
  5. Step 5: Solve for x
    x = 12,105,272.55/3,917.76
  6. Step 6: Final answer
    x = 3,089.85

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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.