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Finding the Fourth Proportional to 20,141.72, 27,795 and 11,189

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Solution

The fourth proportional to 20,141.72, 27,795 and 11,189 is: 15,440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,141.72 : 27,795 = 11,189 : x
  2. Step 2: Convert to fraction form
    20,141.72/27,795 = 11,189/x
  3. Step 3: Cross multiply
    20,141.72x = 27,795 × 11,189
  4. Step 4: Simplify right side
    20,141.72x = 310,998,255
  5. Step 5: Solve for x
    x = 310,998,255/20,141.72
  6. Step 6: Final answer
    x = 15,440.50

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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.