Home / 3,947.45-5,447.43-2,179.01

Finding the Fourth Proportional to 3,947.45, 5,447.43 and 2,179.01

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Solution

The fourth proportional to 3,947.45, 5,447.43 and 2,179.01 is: 3,007.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.45 : 5,447.43 = 2,179.01 : x
  2. Step 2: Convert to fraction form
    3,947.45/5,447.43 = 2,179.01/x
  3. Step 3: Cross multiply
    3,947.45x = 5,447.43 × 2,179.01
  4. Step 4: Simplify right side
    3,947.45x = 11,869,977.21
  5. Step 5: Solve for x
    x = 11,869,977.21/3,947.45
  6. Step 6: Final answer
    x = 3,007.00

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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.