Home / 3,917.45-5,406.09-2,149.06

Finding the Fourth Proportional to 3,917.45, 5,406.09 and 2,149.06

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Solution

The fourth proportional to 3,917.45, 5,406.09 and 2,149.06 is: 2,965.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.45 : 5,406.09 = 2,149.06 : x
  2. Step 2: Convert to fraction form
    3,917.45/5,406.09 = 2,149.06/x
  3. Step 3: Cross multiply
    3,917.45x = 5,406.09 × 2,149.06
  4. Step 4: Simplify right side
    3,917.45x = 11,618,014.55
  5. Step 5: Solve for x
    x = 11,618,014.55/3,917.45
  6. Step 6: Final answer
    x = 2,965.71

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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.