Home / 7,115.31-9,819.62-3,971.50

Finding the Fourth Proportional to 7,115.31, 9,819.62 and 3,971.50

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Solution

The fourth proportional to 7,115.31, 9,819.62 and 3,971.50 is: 5,480.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.31 : 9,819.62 = 3,971.50 : x
  2. Step 2: Convert to fraction form
    7,115.31/9,819.62 = 3,971.50/x
  3. Step 3: Cross multiply
    7,115.31x = 9,819.62 × 3,971.50
  4. Step 4: Simplify right side
    7,115.31x = 38,998,620.83
  5. Step 5: Solve for x
    x = 38,998,620.83/7,115.31
  6. Step 6: Final answer
    x = 5,480.94

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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.