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Finding the Fourth Proportional to 18,730, 28,096.62 and 4,879

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Solution

The fourth proportional to 18,730, 28,096.62 and 4,879 is: 7,318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,730 : 28,096.62 = 4,879 : x
  2. Step 2: Convert to fraction form
    18,730/28,096.62 = 4,879/x
  3. Step 3: Cross multiply
    18,730x = 28,096.62 × 4,879
  4. Step 4: Simplify right side
    18,730x = 137,083,408.98
  5. Step 5: Solve for x
    x = 137,083,408.98/18,730
  6. Step 6: Final answer
    x = 7,318.92

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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.