Home / 13,418.70-20,105.19-8,731.59

Finding the Fourth Proportional to 13,418.70, 20,105.19 and 8,731.59

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Solution

The fourth proportional to 13,418.70, 20,105.19 and 8,731.59 is: 13,082.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.70 : 20,105.19 = 8,731.59 : x
  2. Step 2: Convert to fraction form
    13,418.70/20,105.19 = 8,731.59/x
  3. Step 3: Cross multiply
    13,418.70x = 20,105.19 × 8,731.59
  4. Step 4: Simplify right side
    13,418.70x = 175,550,275.95
  5. Step 5: Solve for x
    x = 175,550,275.95/13,418.70
  6. Step 6: Final answer
    x = 13,082.51

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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.