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Finding the Fourth Proportional to 13,791.91, 20,684.44 and 3,931.27

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Solution

The fourth proportional to 13,791.91, 20,684.44 and 3,931.27 is: 5,895.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.91 : 20,684.44 = 3,931.27 : x
  2. Step 2: Convert to fraction form
    13,791.91/20,684.44 = 3,931.27/x
  3. Step 3: Cross multiply
    13,791.91x = 20,684.44 × 3,931.27
  4. Step 4: Simplify right side
    13,791.91x = 81,316,108.61
  5. Step 5: Solve for x
    x = 81,316,108.61/13,791.91
  6. Step 6: Final answer
    x = 5,895.93

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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.