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Finding the Fourth Proportional to 18,879, 28,318.59 and 5,028

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Solution

The fourth proportional to 18,879, 28,318.59 and 5,028 is: 7,542.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879 : 28,318.59 = 5,028 : x
  2. Step 2: Convert to fraction form
    18,879/28,318.59 = 5,028/x
  3. Step 3: Cross multiply
    18,879x = 28,318.59 × 5,028
  4. Step 4: Simplify right side
    18,879x = 142,385,870.52
  5. Step 5: Solve for x
    x = 142,385,870.52/18,879
  6. Step 6: Final answer
    x = 7,542.02

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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.