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Finding the Fourth Proportional to 7,180.67, 9,908.11 and 3,993.55

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Solution

The fourth proportional to 7,180.67, 9,908.11 and 3,993.55 is: 5,510.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,180.67 : 9,908.11 = 3,993.55 : x
  2. Step 2: Convert to fraction form
    7,180.67/9,908.11 = 3,993.55/x
  3. Step 3: Cross multiply
    7,180.67x = 9,908.11 × 3,993.55
  4. Step 4: Simplify right side
    7,180.67x = 39,568,483.15
  5. Step 5: Solve for x
    x = 39,568,483.15/7,180.67
  6. Step 6: Final answer
    x = 5,510.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.