Home / 5,375.78-7,419.04-3,138.38

Finding the Fourth Proportional to 5,375.78, 7,419.04 and 3,138.38

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Solution

The fourth proportional to 5,375.78, 7,419.04 and 3,138.38 is: 4,331.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,375.78 : 7,419.04 = 3,138.38 : x
  2. Step 2: Convert to fraction form
    5,375.78/7,419.04 = 3,138.38/x
  3. Step 3: Cross multiply
    5,375.78x = 7,419.04 × 3,138.38
  4. Step 4: Simplify right side
    5,375.78x = 23,283,766.76
  5. Step 5: Solve for x
    x = 23,283,766.76/5,375.78
  6. Step 6: Final answer
    x = 4,331.24

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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.