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Finding the Fourth Proportional to 20,141.88, 30,212.83 and 7,659.02

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Solution

The fourth proportional to 20,141.88, 30,212.83 and 7,659.02 is: 11,488.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,141.88 : 30,212.83 = 7,659.02 : x
  2. Step 2: Convert to fraction form
    20,141.88/30,212.83 = 7,659.02/x
  3. Step 3: Cross multiply
    20,141.88x = 30,212.83 × 7,659.02
  4. Step 4: Simplify right side
    20,141.88x = 231,400,650.08
  5. Step 5: Solve for x
    x = 231,400,650.08/20,141.88
  6. Step 6: Final answer
    x = 11,488.53

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Similar ratio
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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.