Home / 3,894.28-5,374.42-2,215.76

Finding the Fourth Proportional to 3,894.28, 5,374.42 and 2,215.76

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Solution

The fourth proportional to 3,894.28, 5,374.42 and 2,215.76 is: 3,057.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.28 : 5,374.42 = 2,215.76 : x
  2. Step 2: Convert to fraction form
    3,894.28/5,374.42 = 2,215.76/x
  3. Step 3: Cross multiply
    3,894.28x = 5,374.42 × 2,215.76
  4. Step 4: Simplify right side
    3,894.28x = 11,908,422.68
  5. Step 5: Solve for x
    x = 11,908,422.68/3,894.28
  6. Step 6: Final answer
    x = 3,057.92

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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.