Home / 7,180.78-9,909.42-3,993.97

Finding the Fourth Proportional to 7,180.78, 9,909.42 and 3,993.97

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Solution

The fourth proportional to 7,180.78, 9,909.42 and 3,993.97 is: 5,511.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,180.78 : 9,909.42 = 3,993.97 : x
  2. Step 2: Convert to fraction form
    7,180.78/9,909.42 = 3,993.97/x
  3. Step 3: Cross multiply
    7,180.78x = 9,909.42 × 3,993.97
  4. Step 4: Simplify right side
    7,180.78x = 39,577,926.20
  5. Step 5: Solve for x
    x = 39,577,926.20/7,180.78
  6. Step 6: Final answer
    x = 5,511.65

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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.