Home / 22,791.15-31,442.31-15,138

Finding the Fourth Proportional to 22,791.15, 31,442.31 and 15,138

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Solution

The fourth proportional to 22,791.15, 31,442.31 and 15,138 is: 20,884.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,791.15 : 31,442.31 = 15,138 : x
  2. Step 2: Convert to fraction form
    22,791.15/31,442.31 = 15,138/x
  3. Step 3: Cross multiply
    22,791.15x = 31,442.31 × 15,138
  4. Step 4: Simplify right side
    22,791.15x = 475,973,688.78
  5. Step 5: Solve for x
    x = 475,973,688.78/22,791.15
  6. Step 6: Final answer
    x = 20,884.15

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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.