Home / 13,791.24-20,676.96-7,129.80

Finding the Fourth Proportional to 13,791.24, 20,676.96 and 7,129.80

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Solution

The fourth proportional to 13,791.24, 20,676.96 and 7,129.80 is: 10,689.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.24 : 20,676.96 = 7,129.80 : x
  2. Step 2: Convert to fraction form
    13,791.24/20,676.96 = 7,129.80/x
  3. Step 3: Cross multiply
    13,791.24x = 20,676.96 × 7,129.80
  4. Step 4: Simplify right side
    13,791.24x = 147,422,589.41
  5. Step 5: Solve for x
    x = 147,422,589.41/13,791.24
  6. Step 6: Final answer
    x = 10,689.58

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1.5x scale

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.