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Finding the Fourth Proportional to 11,169.60, 16,725.60 and 8,865.60

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Solution

The fourth proportional to 11,169.60, 16,725.60 and 8,865.60 is: 13,275.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,169.60 : 16,725.60 = 8,865.60 : x
  2. Step 2: Convert to fraction form
    11,169.60/16,725.60 = 8,865.60/x
  3. Step 3: Cross multiply
    11,169.60x = 16,725.60 × 8,865.60
  4. Step 4: Simplify right side
    11,169.60x = 148,282,479.36
  5. Step 5: Solve for x
    x = 148,282,479.36/11,169.60
  6. Step 6: Final answer
    x = 13,275.54

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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.