Home / 3,971.94-5,481.39-2,179.50

Finding the Fourth Proportional to 3,971.94, 5,481.39 and 2,179.50

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Solution

The fourth proportional to 3,971.94, 5,481.39 and 2,179.50 is: 3,007.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.94 : 5,481.39 = 2,179.50 : x
  2. Step 2: Convert to fraction form
    3,971.94/5,481.39 = 2,179.50/x
  3. Step 3: Cross multiply
    3,971.94x = 5,481.39 × 2,179.50
  4. Step 4: Simplify right side
    3,971.94x = 11,946,689.51
  5. Step 5: Solve for x
    x = 11,946,689.51/3,971.94
  6. Step 6: Final answer
    x = 3,007.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.