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Finding the Fourth Proportional to 20,622.55, 30,912.55 and 8,125.68

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Solution

The fourth proportional to 20,622.55, 30,912.55 and 8,125.68 is: 12,180.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.55 : 30,912.55 = 8,125.68 : x
  2. Step 2: Convert to fraction form
    20,622.55/30,912.55 = 8,125.68/x
  3. Step 3: Cross multiply
    20,622.55x = 30,912.55 × 8,125.68
  4. Step 4: Simplify right side
    20,622.55x = 251,185,489.28
  5. Step 5: Solve for x
    x = 251,185,489.28/20,622.55
  6. Step 6: Final answer
    x = 12,180.14

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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.