Home / 3,917.61-5,406.21-2,149.20

Finding the Fourth Proportional to 3,917.61, 5,406.21 and 2,149.20

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Solution

The fourth proportional to 3,917.61, 5,406.21 and 2,149.20 is: 2,965.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.61 : 5,406.21 = 2,149.20 : x
  2. Step 2: Convert to fraction form
    3,917.61/5,406.21 = 2,149.20/x
  3. Step 3: Cross multiply
    3,917.61x = 5,406.21 × 2,149.20
  4. Step 4: Simplify right side
    3,917.61x = 11,619,026.53
  5. Step 5: Solve for x
    x = 11,619,026.53/3,917.61
  6. Step 6: Final answer
    x = 2,965.85

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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.