Home / 5,257.20-7,255.44-3,928.60

Finding the Fourth Proportional to 5,257.20, 7,255.44 and 3,928.60

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Solution

The fourth proportional to 5,257.20, 7,255.44 and 3,928.60 is: 5,421.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,257.20 : 7,255.44 = 3,928.60 : x
  2. Step 2: Convert to fraction form
    5,257.20/7,255.44 = 3,928.60/x
  3. Step 3: Cross multiply
    5,257.20x = 7,255.44 × 3,928.60
  4. Step 4: Simplify right side
    5,257.20x = 28,503,721.58
  5. Step 5: Solve for x
    x = 28,503,721.58/5,257.20
  6. Step 6: Final answer
    x = 5,421.85

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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.