Home / 3,979.08-5,965.11-2,128.50

Finding the Fourth Proportional to 3,979.08, 5,965.11 and 2,128.50

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Solution

The fourth proportional to 3,979.08, 5,965.11 and 2,128.50 is: 3,190.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.08 : 5,965.11 = 2,128.50 : x
  2. Step 2: Convert to fraction form
    3,979.08/5,965.11 = 2,128.50/x
  3. Step 3: Cross multiply
    3,979.08x = 5,965.11 × 2,128.50
  4. Step 4: Simplify right side
    3,979.08x = 12,696,736.64
  5. Step 5: Solve for x
    x = 12,696,736.64/3,979.08
  6. Step 6: Final answer
    x = 3,190.87

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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.