Home / 5,427.68-8,138.40-2,138.72

Finding the Fourth Proportional to 5,427.68, 8,138.40 and 2,138.72

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Solution

The fourth proportional to 5,427.68, 8,138.40 and 2,138.72 is: 3,206.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,427.68 : 8,138.40 = 2,138.72 : x
  2. Step 2: Convert to fraction form
    5,427.68/8,138.40 = 2,138.72/x
  3. Step 3: Cross multiply
    5,427.68x = 8,138.40 × 2,138.72
  4. Step 4: Simplify right side
    5,427.68x = 17,405,758.85
  5. Step 5: Solve for x
    x = 17,405,758.85/5,427.68
  6. Step 6: Final answer
    x = 3,206.85

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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.