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Finding the Fourth Proportional to 8,866.86, 13,299.69 and 3,936.78

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Solution

The fourth proportional to 8,866.86, 13,299.69 and 3,936.78 is: 5,904.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,866.86 : 13,299.69 = 3,936.78 : x
  2. Step 2: Convert to fraction form
    8,866.86/13,299.69 = 3,936.78/x
  3. Step 3: Cross multiply
    8,866.86x = 13,299.69 × 3,936.78
  4. Step 4: Simplify right side
    8,866.86x = 52,357,953.60
  5. Step 5: Solve for x
    x = 52,357,953.60/8,866.86
  6. Step 6: Final answer
    x = 5,904.90

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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.