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Finding the Fourth Proportional to 13,481.70, 20,191.36 and 13,014.60

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Solution

The fourth proportional to 13,481.70, 20,191.36 and 13,014.60 is: 19,491.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.70 : 20,191.36 = 13,014.60 : x
  2. Step 2: Convert to fraction form
    13,481.70/20,191.36 = 13,014.60/x
  3. Step 3: Cross multiply
    13,481.70x = 20,191.36 × 13,014.60
  4. Step 4: Simplify right side
    13,481.70x = 262,782,473.86
  5. Step 5: Solve for x
    x = 262,782,473.86/13,481.70
  6. Step 6: Final answer
    x = 19,491.79

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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.