Home / 3,911.83-5,398.35-2,143.45

Finding the Fourth Proportional to 3,911.83, 5,398.35 and 2,143.45

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Solution

The fourth proportional to 3,911.83, 5,398.35 and 2,143.45 is: 2,957.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.83 : 5,398.35 = 2,143.45 : x
  2. Step 2: Convert to fraction form
    3,911.83/5,398.35 = 2,143.45/x
  3. Step 3: Cross multiply
    3,911.83x = 5,398.35 × 2,143.45
  4. Step 4: Simplify right side
    3,911.83x = 11,571,093.31
  5. Step 5: Solve for x
    x = 11,571,093.31/3,911.83
  6. Step 6: Final answer
    x = 2,957.97

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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.