Home / 20,138.58-27,789.96-11,186.11

Finding the Fourth Proportional to 20,138.58, 27,789.96 and 11,186.11

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Solution

The fourth proportional to 20,138.58, 27,789.96 and 11,186.11 is: 15,436.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.58 : 27,789.96 = 11,186.11 : x
  2. Step 2: Convert to fraction form
    20,138.58/27,789.96 = 11,186.11/x
  3. Step 3: Cross multiply
    20,138.58x = 27,789.96 × 11,186.11
  4. Step 4: Simplify right side
    20,138.58x = 310,861,479.98
  5. Step 5: Solve for x
    x = 310,861,479.98/20,138.58
  6. Step 6: Final answer
    x = 15,436.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.