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Finding the Fourth Proportional to 8,664.54, 11,957.07 and 5,078.79

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Solution

The fourth proportional to 8,664.54, 11,957.07 and 5,078.79 is: 7,008.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.54 : 11,957.07 = 5,078.79 : x
  2. Step 2: Convert to fraction form
    8,664.54/11,957.07 = 5,078.79/x
  3. Step 3: Cross multiply
    8,664.54x = 11,957.07 × 5,078.79
  4. Step 4: Simplify right side
    8,664.54x = 60,727,447.55
  5. Step 5: Solve for x
    x = 60,727,447.55/8,664.54
  6. Step 6: Final answer
    x = 7,008.73

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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.