Home / 7,086.05-9,778.36-3,942.03

Finding the Fourth Proportional to 7,086.05, 9,778.36 and 3,942.03

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Solution

The fourth proportional to 7,086.05, 9,778.36 and 3,942.03 is: 5,439.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,086.05 : 9,778.36 = 3,942.03 : x
  2. Step 2: Convert to fraction form
    7,086.05/9,778.36 = 3,942.03/x
  3. Step 3: Cross multiply
    7,086.05x = 9,778.36 × 3,942.03
  4. Step 4: Simplify right side
    7,086.05x = 38,546,588.47
  5. Step 5: Solve for x
    x = 38,546,588.47/7,086.05
  6. Step 6: Final answer
    x = 5,439.78

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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.