Home / 3,904.40-5,388-2,135.97

Finding the Fourth Proportional to 3,904.40, 5,388 and 2,135.97

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Solution

The fourth proportional to 3,904.40, 5,388 and 2,135.97 is: 2,947.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.40 : 5,388 = 2,135.97 : x
  2. Step 2: Convert to fraction form
    3,904.40/5,388 = 2,135.97/x
  3. Step 3: Cross multiply
    3,904.40x = 5,388 × 2,135.97
  4. Step 4: Simplify right side
    3,904.40x = 11,508,579.42
  5. Step 5: Solve for x
    x = 11,508,579.42/3,904.40
  6. Step 6: Final answer
    x = 2,947.60

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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.