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Finding the Fourth Proportional to 15,865.26, 21,894.84 and 8,791.71

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Solution

The fourth proportional to 15,865.26, 21,894.84 and 8,791.71 is: 12,132.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,865.26 : 21,894.84 = 8,791.71 : x
  2. Step 2: Convert to fraction form
    15,865.26/21,894.84 = 8,791.71/x
  3. Step 3: Cross multiply
    15,865.26x = 21,894.84 × 8,791.71
  4. Step 4: Simplify right side
    15,865.26x = 192,493,083.78
  5. Step 5: Solve for x
    x = 192,493,083.78/15,865.26
  6. Step 6: Final answer
    x = 12,132.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.