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Finding the Fourth Proportional to 12,650.72, 18,984.28 and 5,725.28

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Solution

The fourth proportional to 12,650.72, 18,984.28 and 5,725.28 is: 8,591.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,650.72 : 18,984.28 = 5,725.28 : x
  2. Step 2: Convert to fraction form
    12,650.72/18,984.28 = 5,725.28/x
  3. Step 3: Cross multiply
    12,650.72x = 18,984.28 × 5,725.28
  4. Step 4: Simplify right side
    12,650.72x = 108,690,318.60
  5. Step 5: Solve for x
    x = 108,690,318.60/12,650.72
  6. Step 6: Final answer
    x = 8,591.63

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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.