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Finding the Fourth Proportional to 18,773.30, 28,167.78 and 8,237.88

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Solution

The fourth proportional to 18,773.30, 28,167.78 and 8,237.88 is: 12,360.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,773.30 : 28,167.78 = 8,237.88 : x
  2. Step 2: Convert to fraction form
    18,773.30/28,167.78 = 8,237.88/x
  3. Step 3: Cross multiply
    18,773.30x = 28,167.78 × 8,237.88
  4. Step 4: Simplify right side
    18,773.30x = 232,042,791.51
  5. Step 5: Solve for x
    x = 232,042,791.51/18,773.30
  6. Step 6: Final answer
    x = 12,360.26

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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.