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Finding the Fourth Proportional to 11,239.60, 16,869.60 and 5,696.80

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Solution

The fourth proportional to 11,239.60, 16,869.60 and 5,696.80 is: 8,550.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,239.60 : 16,869.60 = 5,696.80 : x
  2. Step 2: Convert to fraction form
    11,239.60/16,869.60 = 5,696.80/x
  3. Step 3: Cross multiply
    11,239.60x = 16,869.60 × 5,696.80
  4. Step 4: Simplify right side
    11,239.60x = 96,102,737.28
  5. Step 5: Solve for x
    x = 96,102,737.28/11,239.60
  6. Step 6: Final answer
    x = 8,550.37

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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.