Home / 8,211.72-12,307.84-3,819.88

Finding the Fourth Proportional to 8,211.72, 12,307.84 and 3,819.88

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Solution

The fourth proportional to 8,211.72, 12,307.84 and 3,819.88 is: 5,725.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,211.72 : 12,307.84 = 3,819.88 : x
  2. Step 2: Convert to fraction form
    8,211.72/12,307.84 = 3,819.88/x
  3. Step 3: Cross multiply
    8,211.72x = 12,307.84 × 3,819.88
  4. Step 4: Simplify right side
    8,211.72x = 47,014,471.86
  5. Step 5: Solve for x
    x = 47,014,471.86/8,211.72
  6. Step 6: Final answer
    x = 5,725.29

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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.