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Finding the Fourth Proportional to 20,892.28, 28,832.82 and 11,941.12

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Solution

The fourth proportional to 20,892.28, 28,832.82 and 11,941.12 is: 16,479.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.28 : 28,832.82 = 11,941.12 : x
  2. Step 2: Convert to fraction form
    20,892.28/28,832.82 = 11,941.12/x
  3. Step 3: Cross multiply
    20,892.28x = 28,832.82 × 11,941.12
  4. Step 4: Simplify right side
    20,892.28x = 344,296,163.56
  5. Step 5: Solve for x
    x = 344,296,163.56/20,892.28
  6. Step 6: Final answer
    x = 16,479.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.