Home / 20,091.09-27,724.71-11,138.52

Finding the Fourth Proportional to 20,091.09, 27,724.71 and 11,138.52

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Solution

The fourth proportional to 20,091.09, 27,724.71 and 11,138.52 is: 15,370.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.09 : 27,724.71 = 11,138.52 : x
  2. Step 2: Convert to fraction form
    20,091.09/27,724.71 = 11,138.52/x
  3. Step 3: Cross multiply
    20,091.09x = 27,724.71 × 11,138.52
  4. Step 4: Simplify right side
    20,091.09x = 308,812,236.83
  5. Step 5: Solve for x
    x = 308,812,236.83/20,091.09
  6. Step 6: Final answer
    x = 15,370.61

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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.