Home / 7,115.44-9,819.25-3,928.74

Finding the Fourth Proportional to 7,115.44, 9,819.25 and 3,928.74

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Solution

The fourth proportional to 7,115.44, 9,819.25 and 3,928.74 is: 5,421.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.44 : 9,819.25 = 3,928.74 : x
  2. Step 2: Convert to fraction form
    7,115.44/9,819.25 = 3,928.74/x
  3. Step 3: Cross multiply
    7,115.44x = 9,819.25 × 3,928.74
  4. Step 4: Simplify right side
    7,115.44x = 38,577,280.25
  5. Step 5: Solve for x
    x = 38,577,280.25/7,115.44
  6. Step 6: Final answer
    x = 5,421.63

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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.