Home / 7,979.31-11,969.81-3,299.67

Finding the Fourth Proportional to 7,979.31, 11,969.81 and 3,299.67

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Solution

The fourth proportional to 7,979.31, 11,969.81 and 3,299.67 is: 4,949.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979.31 : 11,969.81 = 3,299.67 : x
  2. Step 2: Convert to fraction form
    7,979.31/11,969.81 = 3,299.67/x
  3. Step 3: Cross multiply
    7,979.31x = 11,969.81 × 3,299.67
  4. Step 4: Simplify right side
    7,979.31x = 39,496,418.84
  5. Step 5: Solve for x
    x = 39,496,418.84/7,979.31
  6. Step 6: Final answer
    x = 4,949.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.