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Finding the Fourth Proportional to 18,669.68, 28,016.24 and 7,576.41

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Solution

The fourth proportional to 18,669.68, 28,016.24 and 7,576.41 is: 11,369.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.68 : 28,016.24 = 7,576.41 : x
  2. Step 2: Convert to fraction form
    18,669.68/28,016.24 = 7,576.41/x
  3. Step 3: Cross multiply
    18,669.68x = 28,016.24 × 7,576.41
  4. Step 4: Simplify right side
    18,669.68x = 212,262,520.90
  5. Step 5: Solve for x
    x = 212,262,520.90/18,669.68
  6. Step 6: Final answer
    x = 11,369.37

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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.