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Finding the Fourth Proportional to 13,278.87, 19,916.87 and 8,333.82

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Solution

The fourth proportional to 13,278.87, 19,916.87 and 8,333.82 is: 12,499.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.87 : 19,916.87 = 8,333.82 : x
  2. Step 2: Convert to fraction form
    13,278.87/19,916.87 = 8,333.82/x
  3. Step 3: Cross multiply
    13,278.87x = 19,916.87 × 8,333.82
  4. Step 4: Simplify right side
    13,278.87x = 165,983,567.87
  5. Step 5: Solve for x
    x = 165,983,567.87/13,278.87
  6. Step 6: Final answer
    x = 12,499.83

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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.