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Finding the Fourth Proportional to 13,843.66, 20,765.49 and 12,462.79

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Solution

The fourth proportional to 13,843.66, 20,765.49 and 12,462.79 is: 18,694.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,843.66 : 20,765.49 = 12,462.79 : x
  2. Step 2: Convert to fraction form
    13,843.66/20,765.49 = 12,462.79/x
  3. Step 3: Cross multiply
    13,843.66x = 20,765.49 × 12,462.79
  4. Step 4: Simplify right side
    13,843.66x = 258,795,941.12
  5. Step 5: Solve for x
    x = 258,795,941.12/13,843.66
  6. Step 6: Final answer
    x = 18,694.19

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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.