Home / 38,661-57,974.32-18,680.36

Finding the Fourth Proportional to 38,661, 57,974.32 and 18,680.36

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Solution

The fourth proportional to 38,661, 57,974.32 and 18,680.36 is: 28,012.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,661 : 57,974.32 = 18,680.36 : x
  2. Step 2: Convert to fraction form
    38,661/57,974.32 = 18,680.36/x
  3. Step 3: Cross multiply
    38,661x = 57,974.32 × 18,680.36
  4. Step 4: Simplify right side
    38,661x = 1,082,981,168.36
  5. Step 5: Solve for x
    x = 1,082,981,168.36/38,661
  6. Step 6: Final answer
    x = 28,012.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.