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Finding the Fourth Proportional to 8,936.80, 13,399.80 and 4,005.52

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Solution

The fourth proportional to 8,936.80, 13,399.80 and 4,005.52 is: 6,005.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,936.80 : 13,399.80 = 4,005.52 : x
  2. Step 2: Convert to fraction form
    8,936.80/13,399.80 = 4,005.52/x
  3. Step 3: Cross multiply
    8,936.80x = 13,399.80 × 4,005.52
  4. Step 4: Simplify right side
    8,936.80x = 53,673,166.90
  5. Step 5: Solve for x
    x = 53,673,166.90/8,936.80
  6. Step 6: Final answer
    x = 6,005.86

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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.