Home / 3,947.37-5,447.38-2,154.85

Finding the Fourth Proportional to 3,947.37, 5,447.38 and 2,154.85

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Solution

The fourth proportional to 3,947.37, 5,447.38 and 2,154.85 is: 2,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.37 : 5,447.38 = 2,154.85 : x
  2. Step 2: Convert to fraction form
    3,947.37/5,447.38 = 2,154.85/x
  3. Step 3: Cross multiply
    3,947.37x = 5,447.38 × 2,154.85
  4. Step 4: Simplify right side
    3,947.37x = 11,738,269.92
  5. Step 5: Solve for x
    x = 11,738,269.92/3,947.37
  6. Step 6: Final answer
    x = 2,973.70

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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.