Home / 7,091.28-9,785.84-3,947.44

Finding the Fourth Proportional to 7,091.28, 9,785.84 and 3,947.44

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Solution

The fourth proportional to 7,091.28, 9,785.84 and 3,947.44 is: 5,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,091.28 : 9,785.84 = 3,947.44 : x
  2. Step 2: Convert to fraction form
    7,091.28/9,785.84 = 3,947.44/x
  3. Step 3: Cross multiply
    7,091.28x = 9,785.84 × 3,947.44
  4. Step 4: Simplify right side
    7,091.28x = 38,629,016.25
  5. Step 5: Solve for x
    x = 38,629,016.25/7,091.28
  6. Step 6: Final answer
    x = 5,447.40

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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.