Home / 8,138.24-12,211.44-3,211.40

Finding the Fourth Proportional to 8,138.24, 12,211.44 and 3,211.40

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Solution

The fourth proportional to 8,138.24, 12,211.44 and 3,211.40 is: 4,818.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.24 : 12,211.44 = 3,211.40 : x
  2. Step 2: Convert to fraction form
    8,138.24/12,211.44 = 3,211.40/x
  3. Step 3: Cross multiply
    8,138.24x = 12,211.44 × 3,211.40
  4. Step 4: Simplify right side
    8,138.24x = 39,215,818.42
  5. Step 5: Solve for x
    x = 39,215,818.42/8,138.24
  6. Step 6: Final answer
    x = 4,818.71

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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.