Home / 11,939.10-17,908.84-3,619.20

Finding the Fourth Proportional to 11,939.10, 17,908.84 and 3,619.20

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Solution

The fourth proportional to 11,939.10, 17,908.84 and 3,619.20 is: 5,428.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,939.10 : 17,908.84 = 3,619.20 : x
  2. Step 2: Convert to fraction form
    11,939.10/17,908.84 = 3,619.20/x
  3. Step 3: Cross multiply
    11,939.10x = 17,908.84 × 3,619.20
  4. Step 4: Simplify right side
    11,939.10x = 64,815,673.73
  5. Step 5: Solve for x
    x = 64,815,673.73/11,939.10
  6. Step 6: Final answer
    x = 5,428.86

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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.