Home / 3,947.47-5,447.54-2,179.11

Finding the Fourth Proportional to 3,947.47, 5,447.54 and 2,179.11

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Solution

The fourth proportional to 3,947.47, 5,447.54 and 2,179.11 is: 3,007.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.47 : 5,447.54 = 2,179.11 : x
  2. Step 2: Convert to fraction form
    3,947.47/5,447.54 = 2,179.11/x
  3. Step 3: Cross multiply
    3,947.47x = 5,447.54 × 2,179.11
  4. Step 4: Simplify right side
    3,947.47x = 11,870,788.89
  5. Step 5: Solve for x
    x = 11,870,788.89/3,947.47
  6. Step 6: Final answer
    x = 3,007.19

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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.