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Finding the Fourth Proportional to 11,278.74, 16,916.43 and 2,958.90

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Solution

The fourth proportional to 11,278.74, 16,916.43 and 2,958.90 is: 4,437.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.74 : 16,916.43 = 2,958.90 : x
  2. Step 2: Convert to fraction form
    11,278.74/16,916.43 = 2,958.90/x
  3. Step 3: Cross multiply
    11,278.74x = 16,916.43 × 2,958.90
  4. Step 4: Simplify right side
    11,278.74x = 50,054,024.73
  5. Step 5: Solve for x
    x = 50,054,024.73/11,278.74
  6. Step 6: Final answer
    x = 4,437.91

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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.