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Finding the Fourth Proportional to 13,791.66, 20,684.06 and 3,931.02

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Solution

The fourth proportional to 13,791.66, 20,684.06 and 3,931.02 is: 5,895.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.66 : 20,684.06 = 3,931.02 : x
  2. Step 2: Convert to fraction form
    13,791.66/20,684.06 = 3,931.02/x
  3. Step 3: Cross multiply
    13,791.66x = 20,684.06 × 3,931.02
  4. Step 4: Simplify right side
    13,791.66x = 81,309,463.37
  5. Step 5: Solve for x
    x = 81,309,463.37/13,791.66
  6. Step 6: Final answer
    x = 5,895.55

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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.