Home / 11,811.84-17,720.46-3,916.86

Finding the Fourth Proportional to 11,811.84, 17,720.46 and 3,916.86

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Solution

The fourth proportional to 11,811.84, 17,720.46 and 3,916.86 is: 5,876.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811.84 : 17,720.46 = 3,916.86 : x
  2. Step 2: Convert to fraction form
    11,811.84/17,720.46 = 3,916.86/x
  3. Step 3: Cross multiply
    11,811.84x = 17,720.46 × 3,916.86
  4. Step 4: Simplify right side
    11,811.84x = 69,408,560.96
  5. Step 5: Solve for x
    x = 69,408,560.96/11,811.84
  6. Step 6: Final answer
    x = 5,876.19

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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.