Home / 9,170.85-13,742.80-5,418.78

Finding the Fourth Proportional to 9,170.85, 13,742.80 and 5,418.78

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Solution

The fourth proportional to 9,170.85, 13,742.80 and 5,418.78 is: 8,120.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,170.85 : 13,742.80 = 5,418.78 : x
  2. Step 2: Convert to fraction form
    9,170.85/13,742.80 = 5,418.78/x
  3. Step 3: Cross multiply
    9,170.85x = 13,742.80 × 5,418.78
  4. Step 4: Simplify right side
    9,170.85x = 74,469,144.70
  5. Step 5: Solve for x
    x = 74,469,144.70/9,170.85
  6. Step 6: Final answer
    x = 8,120.20

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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.