Home / 3,927.61-5,419.97-2,159.21

Finding the Fourth Proportional to 3,927.61, 5,419.97 and 2,159.21

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Solution

The fourth proportional to 3,927.61, 5,419.97 and 2,159.21 is: 2,979.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.61 : 5,419.97 = 2,159.21 : x
  2. Step 2: Convert to fraction form
    3,927.61/5,419.97 = 2,159.21/x
  3. Step 3: Cross multiply
    3,927.61x = 5,419.97 × 2,159.21
  4. Step 4: Simplify right side
    3,927.61x = 11,702,815.53
  5. Step 5: Solve for x
    x = 11,702,815.53/3,927.61
  6. Step 6: Final answer
    x = 2,979.63

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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.