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Finding the Fourth Proportional to 20,572.75, 30,859.01 and 5,781.58

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Solution

The fourth proportional to 20,572.75, 30,859.01 and 5,781.58 is: 8,672.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.75 : 30,859.01 = 5,781.58 : x
  2. Step 2: Convert to fraction form
    20,572.75/30,859.01 = 5,781.58/x
  3. Step 3: Cross multiply
    20,572.75x = 30,859.01 × 5,781.58
  4. Step 4: Simplify right side
    20,572.75x = 178,413,750.66
  5. Step 5: Solve for x
    x = 178,413,750.66/20,572.75
  6. Step 6: Final answer
    x = 8,672.33

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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.