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Finding the Fourth Proportional to 18,760.15, 28,129.83 and 7,674.62

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Solution

The fourth proportional to 18,760.15, 28,129.83 and 7,674.62 is: 11,507.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,760.15 : 28,129.83 = 7,674.62 : x
  2. Step 2: Convert to fraction form
    18,760.15/28,129.83 = 7,674.62/x
  3. Step 3: Cross multiply
    18,760.15x = 28,129.83 × 7,674.62
  4. Step 4: Simplify right side
    18,760.15x = 215,885,755.91
  5. Step 5: Solve for x
    x = 215,885,755.91/18,760.15
  6. Step 6: Final answer
    x = 11,507.68

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.