Home / 3,930.36-5,428.62-3,412.86

Finding the Fourth Proportional to 3,930.36, 5,428.62 and 3,412.86

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Solution

The fourth proportional to 3,930.36, 5,428.62 and 3,412.86 is: 4,713.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.36 : 5,428.62 = 3,412.86 : x
  2. Step 2: Convert to fraction form
    3,930.36/5,428.62 = 3,412.86/x
  3. Step 3: Cross multiply
    3,930.36x = 5,428.62 × 3,412.86
  4. Step 4: Simplify right side
    3,930.36x = 18,527,120.05
  5. Step 5: Solve for x
    x = 18,527,120.05/3,930.36
  6. Step 6: Final answer
    x = 4,713.85

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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.