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Finding the Fourth Proportional to 8,991.72, 13,489.20 and 3,723.87

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Solution

The fourth proportional to 8,991.72, 13,489.20 and 3,723.87 is: 5,586.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.72 : 13,489.20 = 3,723.87 : x
  2. Step 2: Convert to fraction form
    8,991.72/13,489.20 = 3,723.87/x
  3. Step 3: Cross multiply
    8,991.72x = 13,489.20 × 3,723.87
  4. Step 4: Simplify right side
    8,991.72x = 50,232,027.20
  5. Step 5: Solve for x
    x = 50,232,027.20/8,991.72
  6. Step 6: Final answer
    x = 5,586.48

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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.