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Finding the Fourth Proportional to 13,481.01, 20,119.68 and 13,131.09

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Solution

The fourth proportional to 13,481.01, 20,119.68 and 13,131.09 is: 19,597.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.01 : 20,119.68 = 13,131.09 : x
  2. Step 2: Convert to fraction form
    13,481.01/20,119.68 = 13,131.09/x
  3. Step 3: Cross multiply
    13,481.01x = 20,119.68 × 13,131.09
  4. Step 4: Simplify right side
    13,481.01x = 264,193,328.85
  5. Step 5: Solve for x
    x = 264,193,328.85/13,481.01
  6. Step 6: Final answer
    x = 19,597.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.