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Finding the Fourth Proportional to 13,791.56, 20,687.57 and 6,671.66

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Solution

The fourth proportional to 13,791.56, 20,687.57 and 6,671.66 is: 10,007.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.56 : 20,687.57 = 6,671.66 : x
  2. Step 2: Convert to fraction form
    13,791.56/20,687.57 = 6,671.66/x
  3. Step 3: Cross multiply
    13,791.56x = 20,687.57 × 6,671.66
  4. Step 4: Simplify right side
    13,791.56x = 138,020,433.27
  5. Step 5: Solve for x
    x = 138,020,433.27/13,791.56
  6. Step 6: Final answer
    x = 10,007.60

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1.5x scale

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.