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Finding the Fourth Proportional to 20,517.56, 30,745.53 and 15,830.54

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Solution

The fourth proportional to 20,517.56, 30,745.53 and 15,830.54 is: 23,722.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.56 : 30,745.53 = 15,830.54 : x
  2. Step 2: Convert to fraction form
    20,517.56/30,745.53 = 15,830.54/x
  3. Step 3: Cross multiply
    20,517.56x = 30,745.53 × 15,830.54
  4. Step 4: Simplify right side
    20,517.56x = 486,718,188.76
  5. Step 5: Solve for x
    x = 486,718,188.76/20,517.56
  6. Step 6: Final answer
    x = 23,722.04

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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.