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Finding the Fourth Proportional to 13,921.98, 20,891.13 and 5,600.70

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Solution

The fourth proportional to 13,921.98, 20,891.13 and 5,600.70 is: 8,404.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.98 : 20,891.13 = 5,600.70 : x
  2. Step 2: Convert to fraction form
    13,921.98/20,891.13 = 5,600.70/x
  3. Step 3: Cross multiply
    13,921.98x = 20,891.13 × 5,600.70
  4. Step 4: Simplify right side
    13,921.98x = 117,004,951.79
  5. Step 5: Solve for x
    x = 117,004,951.79/13,921.98
  6. Step 6: Final answer
    x = 8,404.33

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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.