Home / 3,919.32-5,407.72-2,869.56

Finding the Fourth Proportional to 3,919.32, 5,407.72 and 2,869.56

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Solution

The fourth proportional to 3,919.32, 5,407.72 and 2,869.56 is: 3,959.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.32 : 5,407.72 = 2,869.56 : x
  2. Step 2: Convert to fraction form
    3,919.32/5,407.72 = 2,869.56/x
  3. Step 3: Cross multiply
    3,919.32x = 5,407.72 × 2,869.56
  4. Step 4: Simplify right side
    3,919.32x = 15,517,777.00
  5. Step 5: Solve for x
    x = 15,517,777.00/3,919.32
  6. Step 6: Final answer
    x = 3,959.30

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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.