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Finding the Fourth Proportional to 8,658.36, 11,949.12 and 5,122.44

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Solution

The fourth proportional to 8,658.36, 11,949.12 and 5,122.44 is: 7,069.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.36 : 11,949.12 = 5,122.44 : x
  2. Step 2: Convert to fraction form
    8,658.36/11,949.12 = 5,122.44/x
  3. Step 3: Cross multiply
    8,658.36x = 11,949.12 × 5,122.44
  4. Step 4: Simplify right side
    8,658.36x = 61,208,650.25
  5. Step 5: Solve for x
    x = 61,208,650.25/8,658.36
  6. Step 6: Final answer
    x = 7,069.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.