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Finding the Fourth Proportional to 20,500.58, 30,755.19 and 6,648.50

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Solution

The fourth proportional to 20,500.58, 30,755.19 and 6,648.50 is: 9,974.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.58 : 30,755.19 = 6,648.50 : x
  2. Step 2: Convert to fraction form
    20,500.58/30,755.19 = 6,648.50/x
  3. Step 3: Cross multiply
    20,500.58x = 30,755.19 × 6,648.50
  4. Step 4: Simplify right side
    20,500.58x = 204,475,880.72
  5. Step 5: Solve for x
    x = 204,475,880.72/20,500.58
  6. Step 6: Final answer
    x = 9,974.15

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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.