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Finding the Fourth Proportional to 28,791.32, 43,193.81 and 9,069.83

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Solution

The fourth proportional to 28,791.32, 43,193.81 and 9,069.83 is: 13,606.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,791.32 : 43,193.81 = 9,069.83 : x
  2. Step 2: Convert to fraction form
    28,791.32/43,193.81 = 9,069.83/x
  3. Step 3: Cross multiply
    28,791.32x = 43,193.81 × 9,069.83
  4. Step 4: Simplify right side
    28,791.32x = 391,760,320.46
  5. Step 5: Solve for x
    x = 391,760,320.46/28,791.32
  6. Step 6: Final answer
    x = 13,606.89

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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.