Home / 20,078.31-27,706.82-11,125.29

Finding the Fourth Proportional to 20,078.31, 27,706.82 and 11,125.29

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Solution

The fourth proportional to 20,078.31, 27,706.82 and 11,125.29 is: 15,352.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.31 : 27,706.82 = 11,125.29 : x
  2. Step 2: Convert to fraction form
    20,078.31/27,706.82 = 11,125.29/x
  3. Step 3: Cross multiply
    20,078.31x = 27,706.82 × 11,125.29
  4. Step 4: Simplify right side
    20,078.31x = 308,246,351.85
  5. Step 5: Solve for x
    x = 308,246,351.85/20,078.31
  6. Step 6: Final answer
    x = 15,352.21

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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.