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Finding the Fourth Proportional to 20,500.70, 30,745.58 and 8,811.18

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Solution

The fourth proportional to 20,500.70, 30,745.58 and 8,811.18 is: 13,214.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.70 : 30,745.58 = 8,811.18 : x
  2. Step 2: Convert to fraction form
    20,500.70/30,745.58 = 8,811.18/x
  3. Step 3: Cross multiply
    20,500.70x = 30,745.58 × 8,811.18
  4. Step 4: Simplify right side
    20,500.70x = 270,904,795.53
  5. Step 5: Solve for x
    x = 270,904,795.53/20,500.70
  6. Step 6: Final answer
    x = 13,214.42

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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.