Home / 13,381.12-20,067.90-8,443.36

Finding the Fourth Proportional to 13,381.12, 20,067.90 and 8,443.36

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Solution

The fourth proportional to 13,381.12, 20,067.90 and 8,443.36 is: 12,662.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.12 : 20,067.90 = 8,443.36 : x
  2. Step 2: Convert to fraction form
    13,381.12/20,067.90 = 8,443.36/x
  3. Step 3: Cross multiply
    13,381.12x = 20,067.90 × 8,443.36
  4. Step 4: Simplify right side
    13,381.12x = 169,440,504.14
  5. Step 5: Solve for x
    x = 169,440,504.14/13,381.12
  6. Step 6: Final answer
    x = 12,662.65

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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.