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Finding the Fourth Proportional to 8,722.78, 13,071.18 and 3,789.73

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Solution

The fourth proportional to 8,722.78, 13,071.18 and 3,789.73 is: 5,678.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722.78 : 13,071.18 = 3,789.73 : x
  2. Step 2: Convert to fraction form
    8,722.78/13,071.18 = 3,789.73/x
  3. Step 3: Cross multiply
    8,722.78x = 13,071.18 × 3,789.73
  4. Step 4: Simplify right side
    8,722.78x = 49,536,242.98
  5. Step 5: Solve for x
    x = 49,536,242.98/8,722.78
  6. Step 6: Final answer
    x = 5,678.95

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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.