Home / 13,351.76-20,021.88-5,138

Finding the Fourth Proportional to 13,351.76, 20,021.88 and 5,138

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Solution

The fourth proportional to 13,351.76, 20,021.88 and 5,138 is: 7,704.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,351.76 : 20,021.88 = 5,138 : x
  2. Step 2: Convert to fraction form
    13,351.76/20,021.88 = 5,138/x
  3. Step 3: Cross multiply
    13,351.76x = 20,021.88 × 5,138
  4. Step 4: Simplify right side
    13,351.76x = 102,872,419.44
  5. Step 5: Solve for x
    x = 102,872,419.44/13,351.76
  6. Step 6: Final answer
    x = 7,704.78

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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.