Home / 11,939.76-17,899.38-4,147.56

Finding the Fourth Proportional to 11,939.76, 17,899.38 and 4,147.56

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Solution

The fourth proportional to 11,939.76, 17,899.38 and 4,147.56 is: 6,217.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,939.76 : 17,899.38 = 4,147.56 : x
  2. Step 2: Convert to fraction form
    11,939.76/17,899.38 = 4,147.56/x
  3. Step 3: Cross multiply
    11,939.76x = 17,899.38 × 4,147.56
  4. Step 4: Simplify right side
    11,939.76x = 74,238,752.51
  5. Step 5: Solve for x
    x = 74,238,752.51/11,939.76
  6. Step 6: Final answer
    x = 6,217.78

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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.