Home / 8,679.29-13,016.24-3,131.91

Finding the Fourth Proportional to 8,679.29, 13,016.24 and 3,131.91

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Solution

The fourth proportional to 8,679.29, 13,016.24 and 3,131.91 is: 4,696.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.29 : 13,016.24 = 3,131.91 : x
  2. Step 2: Convert to fraction form
    8,679.29/13,016.24 = 3,131.91/x
  3. Step 3: Cross multiply
    8,679.29x = 13,016.24 × 3,131.91
  4. Step 4: Simplify right side
    8,679.29x = 40,765,676.56
  5. Step 5: Solve for x
    x = 40,765,676.56/8,679.29
  6. Step 6: Final answer
    x = 4,696.89

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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.