Home / 13,991.26-20,989.17-4,131.54

Finding the Fourth Proportional to 13,991.26, 20,989.17 and 4,131.54

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Solution

The fourth proportional to 13,991.26, 20,989.17 and 4,131.54 is: 6,197.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.26 : 20,989.17 = 4,131.54 : x
  2. Step 2: Convert to fraction form
    13,991.26/20,989.17 = 4,131.54/x
  3. Step 3: Cross multiply
    13,991.26x = 20,989.17 × 4,131.54
  4. Step 4: Simplify right side
    13,991.26x = 86,717,516.71
  5. Step 5: Solve for x
    x = 86,717,516.71/13,991.26
  6. Step 6: Final answer
    x = 6,197.98

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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.