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Finding the Fourth Proportional to 20,393.28, 30,583.44 and 7,912.44

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Solution

The fourth proportional to 20,393.28, 30,583.44 and 7,912.44 is: 11,866.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.28 : 30,583.44 = 7,912.44 : x
  2. Step 2: Convert to fraction form
    20,393.28/30,583.44 = 7,912.44/x
  3. Step 3: Cross multiply
    20,393.28x = 30,583.44 × 7,912.44
  4. Step 4: Simplify right side
    20,393.28x = 241,989,633.99
  5. Step 5: Solve for x
    x = 241,989,633.99/20,393.28
  6. Step 6: Final answer
    x = 11,866.15

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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.