Home / 21,155.88-29,195.31-11,724.64

Finding the Fourth Proportional to 21,155.88, 29,195.31 and 11,724.64

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Solution

The fourth proportional to 21,155.88, 29,195.31 and 11,724.64 is: 16,180.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.88 : 29,195.31 = 11,724.64 : x
  2. Step 2: Convert to fraction form
    21,155.88/29,195.31 = 11,724.64/x
  3. Step 3: Cross multiply
    21,155.88x = 29,195.31 × 11,724.64
  4. Step 4: Simplify right side
    21,155.88x = 342,304,499.44
  5. Step 5: Solve for x
    x = 342,304,499.44/21,155.88
  6. Step 6: Final answer
    x = 16,180.11

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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.