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Finding the Fourth Proportional to 18,676.91, 28,022.85 and 7,584.45

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Solution

The fourth proportional to 18,676.91, 28,022.85 and 7,584.45 is: 11,379.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.91 : 28,022.85 = 7,584.45 : x
  2. Step 2: Convert to fraction form
    18,676.91/28,022.85 = 7,584.45/x
  3. Step 3: Cross multiply
    18,676.91x = 28,022.85 × 7,584.45
  4. Step 4: Simplify right side
    18,676.91x = 212,537,904.68
  5. Step 5: Solve for x
    x = 212,537,904.68/18,676.91
  6. Step 6: Final answer
    x = 11,379.72

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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.