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Finding the Fourth Proportional to 5,878.20, 8,819.34 and 3,911.72

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Solution

The fourth proportional to 5,878.20, 8,819.34 and 3,911.72 is: 5,868.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,878.20 : 8,819.34 = 3,911.72 : x
  2. Step 2: Convert to fraction form
    5,878.20/8,819.34 = 3,911.72/x
  3. Step 3: Cross multiply
    5,878.20x = 8,819.34 × 3,911.72
  4. Step 4: Simplify right side
    5,878.20x = 34,498,788.66
  5. Step 5: Solve for x
    x = 34,498,788.66/5,878.20
  6. Step 6: Final answer
    x = 5,868.94

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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.