Home / 11,215.80-16,799.38-8,131

Finding the Fourth Proportional to 11,215.80, 16,799.38 and 8,131

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Solution

The fourth proportional to 11,215.80, 16,799.38 and 8,131 is: 12,178.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,215.80 : 16,799.38 = 8,131 : x
  2. Step 2: Convert to fraction form
    11,215.80/16,799.38 = 8,131/x
  3. Step 3: Cross multiply
    11,215.80x = 16,799.38 × 8,131
  4. Step 4: Simplify right side
    11,215.80x = 136,595,758.78
  5. Step 5: Solve for x
    x = 136,595,758.78/11,215.80
  6. Step 6: Final answer
    x = 12,178.87

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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.