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Finding the Fourth Proportional to 20,425.56, 30,641.22 and 7,274.04

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Solution

The fourth proportional to 20,425.56, 30,641.22 and 7,274.04 is: 10,912.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.56 : 30,641.22 = 7,274.04 : x
  2. Step 2: Convert to fraction form
    20,425.56/30,641.22 = 7,274.04/x
  3. Step 3: Cross multiply
    20,425.56x = 30,641.22 × 7,274.04
  4. Step 4: Simplify right side
    20,425.56x = 222,885,459.93
  5. Step 5: Solve for x
    x = 222,885,459.93/20,425.56
  6. Step 6: Final answer
    x = 10,912.09

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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.