Home / 7,979.40-11,968.14-2,136.48

Finding the Fourth Proportional to 7,979.40, 11,968.14 and 2,136.48

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Solution

The fourth proportional to 7,979.40, 11,968.14 and 2,136.48 is: 3,204.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979.40 : 11,968.14 = 2,136.48 : x
  2. Step 2: Convert to fraction form
    7,979.40/11,968.14 = 2,136.48/x
  3. Step 3: Cross multiply
    7,979.40x = 11,968.14 × 2,136.48
  4. Step 4: Simplify right side
    7,979.40x = 25,569,691.75
  5. Step 5: Solve for x
    x = 25,569,691.75/7,979.40
  6. Step 6: Final answer
    x = 3,204.46

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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.