Home / 3,917.94-5,406.77-2,149.56

Finding the Fourth Proportional to 3,917.94, 5,406.77 and 2,149.56

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Solution

The fourth proportional to 3,917.94, 5,406.77 and 2,149.56 is: 2,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.94 : 5,406.77 = 2,149.56 : x
  2. Step 2: Convert to fraction form
    3,917.94/5,406.77 = 2,149.56/x
  3. Step 3: Cross multiply
    3,917.94x = 5,406.77 × 2,149.56
  4. Step 4: Simplify right side
    3,917.94x = 11,622,165.77
  5. Step 5: Solve for x
    x = 11,622,165.77/3,917.94
  6. Step 6: Final answer
    x = 2,966.40

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1.5x scale

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.