Home / 5,439.78-8,139.60-3,360.90

Finding the Fourth Proportional to 5,439.78, 8,139.60 and 3,360.90

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Solution

The fourth proportional to 5,439.78, 8,139.60 and 3,360.90 is: 5,028.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,439.78 : 8,139.60 = 3,360.90 : x
  2. Step 2: Convert to fraction form
    5,439.78/8,139.60 = 3,360.90/x
  3. Step 3: Cross multiply
    5,439.78x = 8,139.60 × 3,360.90
  4. Step 4: Simplify right side
    5,439.78x = 27,356,381.64
  5. Step 5: Solve for x
    x = 27,356,381.64/5,439.78
  6. Step 6: Final answer
    x = 5,028.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.