Home / 5,251.21-7,245.75-3,155.38

Finding the Fourth Proportional to 5,251.21, 7,245.75 and 3,155.38

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Solution

The fourth proportional to 5,251.21, 7,245.75 and 3,155.38 is: 4,353.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,251.21 : 7,245.75 = 3,155.38 : x
  2. Step 2: Convert to fraction form
    5,251.21/7,245.75 = 3,155.38/x
  3. Step 3: Cross multiply
    5,251.21x = 7,245.75 × 3,155.38
  4. Step 4: Simplify right side
    5,251.21x = 22,863,094.64
  5. Step 5: Solve for x
    x = 22,863,094.64/5,251.21
  6. Step 6: Final answer
    x = 4,353.87

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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.