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Finding the Fourth Proportional to 18,879.54, 28,319.07 and 5,731.41

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Solution

The fourth proportional to 18,879.54, 28,319.07 and 5,731.41 is: 8,597.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.54 : 28,319.07 = 5,731.41 : x
  2. Step 2: Convert to fraction form
    18,879.54/28,319.07 = 5,731.41/x
  3. Step 3: Cross multiply
    18,879.54x = 28,319.07 × 5,731.41
  4. Step 4: Simplify right side
    18,879.54x = 162,308,200.99
  5. Step 5: Solve for x
    x = 162,308,200.99/18,879.54
  6. Step 6: Final answer
    x = 8,597.04

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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.