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Finding the Fourth Proportional to 18,361.28, 27,542.28 and 5,213.72

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Solution

The fourth proportional to 18,361.28, 27,542.28 and 5,213.72 is: 7,820.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,361.28 : 27,542.28 = 5,213.72 : x
  2. Step 2: Convert to fraction form
    18,361.28/27,542.28 = 5,213.72/x
  3. Step 3: Cross multiply
    18,361.28x = 27,542.28 × 5,213.72
  4. Step 4: Simplify right side
    18,361.28x = 143,597,736.08
  5. Step 5: Solve for x
    x = 143,597,736.08/18,361.28
  6. Step 6: Final answer
    x = 7,820.68

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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.