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Finding the Fourth Proportional to 10,939, 16,408.50 and 2,731

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Solution

The fourth proportional to 10,939, 16,408.50 and 2,731 is: 4,096.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939 : 16,408.50 = 2,731 : x
  2. Step 2: Convert to fraction form
    10,939/16,408.50 = 2,731/x
  3. Step 3: Cross multiply
    10,939x = 16,408.50 × 2,731
  4. Step 4: Simplify right side
    10,939x = 44,811,613.50
  5. Step 5: Solve for x
    x = 44,811,613.50/10,939
  6. Step 6: Final answer
    x = 4,096.50

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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.