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Finding the Fourth Proportional to 8,789.70, 13,172.91 and 5,494.98

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Solution

The fourth proportional to 8,789.70, 13,172.91 and 5,494.98 is: 8,235.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.70 : 13,172.91 = 5,494.98 : x
  2. Step 2: Convert to fraction form
    8,789.70/13,172.91 = 5,494.98/x
  3. Step 3: Cross multiply
    8,789.70x = 13,172.91 × 5,494.98
  4. Step 4: Simplify right side
    8,789.70x = 72,384,876.99
  5. Step 5: Solve for x
    x = 72,384,876.99/8,789.70
  6. Step 6: Final answer
    x = 8,235.19

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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.