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Finding the Fourth Proportional to 25,791.42, 38,687.66 and 8,261.19

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Solution

The fourth proportional to 25,791.42, 38,687.66 and 8,261.19 is: 12,391.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,791.42 : 38,687.66 = 8,261.19 : x
  2. Step 2: Convert to fraction form
    25,791.42/38,687.66 = 8,261.19/x
  3. Step 3: Cross multiply
    25,791.42x = 38,687.66 × 8,261.19
  4. Step 4: Simplify right side
    25,791.42x = 319,606,068.61
  5. Step 5: Solve for x
    x = 319,606,068.61/25,791.42
  6. Step 6: Final answer
    x = 12,391.95

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.