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Finding the Fourth Proportional to 18,757.55, 28,125.94 and 7,672.03

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Solution

The fourth proportional to 18,757.55, 28,125.94 and 7,672.03 is: 11,503.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.55 : 28,125.94 = 7,672.03 : x
  2. Step 2: Convert to fraction form
    18,757.55/28,125.94 = 7,672.03/x
  3. Step 3: Cross multiply
    18,757.55x = 28,125.94 × 7,672.03
  4. Step 4: Simplify right side
    18,757.55x = 215,783,017.21
  5. Step 5: Solve for x
    x = 215,783,017.21/18,757.55
  6. Step 6: Final answer
    x = 11,503.79

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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.