Home / 8,121.15-12,175.65-5,193.81

Finding the Fourth Proportional to 8,121.15, 12,175.65 and 5,193.81

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Solution

The fourth proportional to 8,121.15, 12,175.65 and 5,193.81 is: 7,786.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.15 : 12,175.65 = 5,193.81 : x
  2. Step 2: Convert to fraction form
    8,121.15/12,175.65 = 5,193.81/x
  3. Step 3: Cross multiply
    8,121.15x = 12,175.65 × 5,193.81
  4. Step 4: Simplify right side
    8,121.15x = 63,238,012.73
  5. Step 5: Solve for x
    x = 63,238,012.73/8,121.15
  6. Step 6: Final answer
    x = 7,786.83

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1.5x scale

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.