Home / 13,321.92-19,979.10-3,961.56

Finding the Fourth Proportional to 13,321.92, 19,979.10 and 3,961.56

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Solution

The fourth proportional to 13,321.92, 19,979.10 and 3,961.56 is: 5,941.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.92 : 19,979.10 = 3,961.56 : x
  2. Step 2: Convert to fraction form
    13,321.92/19,979.10 = 3,961.56/x
  3. Step 3: Cross multiply
    13,321.92x = 19,979.10 × 3,961.56
  4. Step 4: Simplify right side
    13,321.92x = 79,148,403.40
  5. Step 5: Solve for x
    x = 79,148,403.40/13,321.92
  6. Step 6: Final answer
    x = 5,941.22

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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.