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Finding the Fourth Proportional to 20,575.82, 30,865.17 and 8,728.25

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Solution

The fourth proportional to 20,575.82, 30,865.17 and 8,728.25 is: 13,092.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,575.82 : 30,865.17 = 8,728.25 : x
  2. Step 2: Convert to fraction form
    20,575.82/30,865.17 = 8,728.25/x
  3. Step 3: Cross multiply
    20,575.82x = 30,865.17 × 8,728.25
  4. Step 4: Simplify right side
    20,575.82x = 269,398,953.28
  5. Step 5: Solve for x
    x = 269,398,953.28/20,575.82
  6. Step 6: Final answer
    x = 13,092.99

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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.