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Finding the Fourth Proportional to 18,798.21, 28,201.67 and 5,471.52

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Solution

The fourth proportional to 18,798.21, 28,201.67 and 5,471.52 is: 8,208.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,798.21 : 28,201.67 = 5,471.52 : x
  2. Step 2: Convert to fraction form
    18,798.21/28,201.67 = 5,471.52/x
  3. Step 3: Cross multiply
    18,798.21x = 28,201.67 × 5,471.52
  4. Step 4: Simplify right side
    18,798.21x = 154,305,974.08
  5. Step 5: Solve for x
    x = 154,305,974.08/18,798.21
  6. Step 6: Final answer
    x = 8,208.55

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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.