Home / 7,979.78-11,975.14-2,785.64

Finding the Fourth Proportional to 7,979.78, 11,975.14 and 2,785.64

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Solution

The fourth proportional to 7,979.78, 11,975.14 and 2,785.64 is: 4,180.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979.78 : 11,975.14 = 2,785.64 : x
  2. Step 2: Convert to fraction form
    7,979.78/11,975.14 = 2,785.64/x
  3. Step 3: Cross multiply
    7,979.78x = 11,975.14 × 2,785.64
  4. Step 4: Simplify right side
    7,979.78x = 33,358,428.99
  5. Step 5: Solve for x
    x = 33,358,428.99/7,979.78
  6. Step 6: Final answer
    x = 4,180.37

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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.