Home / 3,904.29-5,387.85-2,135.88

Finding the Fourth Proportional to 3,904.29, 5,387.85 and 2,135.88

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Solution

The fourth proportional to 3,904.29, 5,387.85 and 2,135.88 is: 2,947.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.29 : 5,387.85 = 2,135.88 : x
  2. Step 2: Convert to fraction form
    3,904.29/5,387.85 = 2,135.88/x
  3. Step 3: Cross multiply
    3,904.29x = 5,387.85 × 2,135.88
  4. Step 4: Simplify right side
    3,904.29x = 11,507,774.12
  5. Step 5: Solve for x
    x = 11,507,774.12/3,904.29
  6. Step 6: Final answer
    x = 2,947.47

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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.