Home / 20,650.75-30,963.82-8,172.55

Finding the Fourth Proportional to 20,650.75, 30,963.82 and 8,172.55

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Solution

The fourth proportional to 20,650.75, 30,963.82 and 8,172.55 is: 12,253.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.75 : 30,963.82 = 8,172.55 : x
  2. Step 2: Convert to fraction form
    20,650.75/30,963.82 = 8,172.55/x
  3. Step 3: Cross multiply
    20,650.75x = 30,963.82 × 8,172.55
  4. Step 4: Simplify right side
    20,650.75x = 253,053,226.57
  5. Step 5: Solve for x
    x = 253,053,226.57/20,650.75
  6. Step 6: Final answer
    x = 12,253.95

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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.