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Finding the Fourth Proportional to 18,921.44, 28,399.44 and 14,524.64

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Solution

The fourth proportional to 18,921.44, 28,399.44 and 14,524.64 is: 21,800.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.44 : 28,399.44 = 14,524.64 : x
  2. Step 2: Convert to fraction form
    18,921.44/28,399.44 = 14,524.64/x
  3. Step 3: Cross multiply
    18,921.44x = 28,399.44 × 14,524.64
  4. Step 4: Simplify right side
    18,921.44x = 412,491,642.20
  5. Step 5: Solve for x
    x = 412,491,642.20/18,921.44
  6. Step 6: Final answer
    x = 21,800.22

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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.