Home / 5,431.74-8,149.92-3,678.72

Finding the Fourth Proportional to 5,431.74, 8,149.92 and 3,678.72

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Solution

The fourth proportional to 5,431.74, 8,149.92 and 3,678.72 is: 5,519.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.74 : 8,149.92 = 3,678.72 : x
  2. Step 2: Convert to fraction form
    5,431.74/8,149.92 = 3,678.72/x
  3. Step 3: Cross multiply
    5,431.74x = 8,149.92 × 3,678.72
  4. Step 4: Simplify right side
    5,431.74x = 29,981,273.70
  5. Step 5: Solve for x
    x = 29,981,273.70/5,431.74
  6. Step 6: Final answer
    x = 5,519.64

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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.