Home / 3,917.39-5,405.97-2,149.01

Finding the Fourth Proportional to 3,917.39, 5,405.97 and 2,149.01

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Solution

The fourth proportional to 3,917.39, 5,405.97 and 2,149.01 is: 2,965.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.39 : 5,405.97 = 2,149.01 : x
  2. Step 2: Convert to fraction form
    3,917.39/5,405.97 = 2,149.01/x
  3. Step 3: Cross multiply
    3,917.39x = 5,405.97 × 2,149.01
  4. Step 4: Simplify right side
    3,917.39x = 11,617,483.59
  5. Step 5: Solve for x
    x = 11,617,483.59/3,917.39
  6. Step 6: Final answer
    x = 2,965.62

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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.