Home / 3,894.40-5,374.23-2,215.81

Finding the Fourth Proportional to 3,894.40, 5,374.23 and 2,215.81

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Solution

The fourth proportional to 3,894.40, 5,374.23 and 2,215.81 is: 3,057.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.40 : 5,374.23 = 2,215.81 : x
  2. Step 2: Convert to fraction form
    3,894.40/5,374.23 = 2,215.81/x
  3. Step 3: Cross multiply
    3,894.40x = 5,374.23 × 2,215.81
  4. Step 4: Simplify right side
    3,894.40x = 11,908,240.17
  5. Step 5: Solve for x
    x = 11,908,240.17/3,894.40
  6. Step 6: Final answer
    x = 3,057.78

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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.