Home / 20,138.32-27,790.87-11,186.66

Finding the Fourth Proportional to 20,138.32, 27,790.87 and 11,186.66

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Solution

The fourth proportional to 20,138.32, 27,790.87 and 11,186.66 is: 15,437.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.32 : 27,790.87 = 11,186.66 : x
  2. Step 2: Convert to fraction form
    20,138.32/27,790.87 = 11,186.66/x
  3. Step 3: Cross multiply
    20,138.32x = 27,790.87 × 11,186.66
  4. Step 4: Simplify right side
    20,138.32x = 310,886,951.42
  5. Step 5: Solve for x
    x = 310,886,951.42/20,138.32
  6. Step 6: Final answer
    x = 15,437.58

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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.