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Finding the Fourth Proportional to 12,489.44, 18,734.22 and 3,724.43

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Solution

The fourth proportional to 12,489.44, 18,734.22 and 3,724.43 is: 5,586.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.44 : 18,734.22 = 3,724.43 : x
  2. Step 2: Convert to fraction form
    12,489.44/18,734.22 = 3,724.43/x
  3. Step 3: Cross multiply
    12,489.44x = 18,734.22 × 3,724.43
  4. Step 4: Simplify right side
    12,489.44x = 69,774,197.32
  5. Step 5: Solve for x
    x = 69,774,197.32/12,489.44
  6. Step 6: Final answer
    x = 5,586.66

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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.