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Finding the Fourth Proportional to 27,157.55, 40,724.78 and 12,375.86

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Solution

The fourth proportional to 27,157.55, 40,724.78 and 12,375.86 is: 18,558.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,157.55 : 40,724.78 = 12,375.86 : x
  2. Step 2: Convert to fraction form
    27,157.55/40,724.78 = 12,375.86/x
  3. Step 3: Cross multiply
    27,157.55x = 40,724.78 × 12,375.86
  4. Step 4: Simplify right side
    27,157.55x = 504,003,910.31
  5. Step 5: Solve for x
    x = 504,003,910.31/27,157.55
  6. Step 6: Final answer
    x = 18,558.52

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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.