Home / 5,818.20-8,729.25-2,120.70

Finding the Fourth Proportional to 5,818.20, 8,729.25 and 2,120.70

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Solution

The fourth proportional to 5,818.20, 8,729.25 and 2,120.70 is: 3,181.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,818.20 : 8,729.25 = 2,120.70 : x
  2. Step 2: Convert to fraction form
    5,818.20/8,729.25 = 2,120.70/x
  3. Step 3: Cross multiply
    5,818.20x = 8,729.25 × 2,120.70
  4. Step 4: Simplify right side
    5,818.20x = 18,512,120.48
  5. Step 5: Solve for x
    x = 18,512,120.48/5,818.20
  6. Step 6: Final answer
    x = 3,181.76

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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.