Home / 7,979.82-11,969.88-2,136.38

Finding the Fourth Proportional to 7,979.82, 11,969.88 and 2,136.38

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Solution

The fourth proportional to 7,979.82, 11,969.88 and 2,136.38 is: 3,204.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979.82 : 11,969.88 = 2,136.38 : x
  2. Step 2: Convert to fraction form
    7,979.82/11,969.88 = 2,136.38/x
  3. Step 3: Cross multiply
    7,979.82x = 11,969.88 × 2,136.38
  4. Step 4: Simplify right side
    7,979.82x = 25,572,144.37
  5. Step 5: Solve for x
    x = 25,572,144.37/7,979.82
  6. Step 6: Final answer
    x = 3,204.60

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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.