Home / 13,820.03-20,729.07-3,431.78

Finding the Fourth Proportional to 13,820.03, 20,729.07 and 3,431.78

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Solution

The fourth proportional to 13,820.03, 20,729.07 and 3,431.78 is: 5,147.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.03 : 20,729.07 = 3,431.78 : x
  2. Step 2: Convert to fraction form
    13,820.03/20,729.07 = 3,431.78/x
  3. Step 3: Cross multiply
    13,820.03x = 20,729.07 × 3,431.78
  4. Step 4: Simplify right side
    13,820.03x = 71,137,504.20
  5. Step 5: Solve for x
    x = 71,137,504.20/13,820.03
  6. Step 6: Final answer
    x = 5,147.42

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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.