Home / 3,947.26-5,447.25-2,154.75

Finding the Fourth Proportional to 3,947.26, 5,447.25 and 2,154.75

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Solution

The fourth proportional to 3,947.26, 5,447.25 and 2,154.75 is: 2,973.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.26 : 5,447.25 = 2,154.75 : x
  2. Step 2: Convert to fraction form
    3,947.26/5,447.25 = 2,154.75/x
  3. Step 3: Cross multiply
    3,947.26x = 5,447.25 × 2,154.75
  4. Step 4: Simplify right side
    3,947.26x = 11,737,472.15
  5. Step 5: Solve for x
    x = 11,737,472.15/3,947.26
  6. Step 6: Final answer
    x = 2,973.58

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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.