Home / 3,904.28-5,387.91-2,135.90

Finding the Fourth Proportional to 3,904.28, 5,387.91 and 2,135.90

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Solution

The fourth proportional to 3,904.28, 5,387.91 and 2,135.90 is: 2,947.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.28 : 5,387.91 = 2,135.90 : x
  2. Step 2: Convert to fraction form
    3,904.28/5,387.91 = 2,135.90/x
  3. Step 3: Cross multiply
    3,904.28x = 5,387.91 × 2,135.90
  4. Step 4: Simplify right side
    3,904.28x = 11,508,031.63
  5. Step 5: Solve for x
    x = 11,508,031.63/3,904.28
  6. Step 6: Final answer
    x = 2,947.54

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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.