Home / 20,639.57-30,938.33-8,142.44

Finding the Fourth Proportional to 20,639.57, 30,938.33 and 8,142.44

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Solution

The fourth proportional to 20,639.57, 30,938.33 and 8,142.44 is: 12,205.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.57 : 30,938.33 = 8,142.44 : x
  2. Step 2: Convert to fraction form
    20,639.57/30,938.33 = 8,142.44/x
  3. Step 3: Cross multiply
    20,639.57x = 30,938.33 × 8,142.44
  4. Step 4: Simplify right side
    20,639.57x = 251,913,361.39
  5. Step 5: Solve for x
    x = 251,913,361.39/20,639.57
  6. Step 6: Final answer
    x = 12,205.36

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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.