Home / 8,135.21-12,205.56-3,455.03

Finding the Fourth Proportional to 8,135.21, 12,205.56 and 3,455.03

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Solution

The fourth proportional to 8,135.21, 12,205.56 and 3,455.03 is: 5,183.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,135.21 : 12,205.56 = 3,455.03 : x
  2. Step 2: Convert to fraction form
    8,135.21/12,205.56 = 3,455.03/x
  3. Step 3: Cross multiply
    8,135.21x = 12,205.56 × 3,455.03
  4. Step 4: Simplify right side
    8,135.21x = 42,170,514.94
  5. Step 5: Solve for x
    x = 42,170,514.94/8,135.21
  6. Step 6: Final answer
    x = 5,183.71

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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.