Home / 20,738.86-31,091.10-8,082.34

Finding the Fourth Proportional to 20,738.86, 31,091.10 and 8,082.34

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Solution

The fourth proportional to 20,738.86, 31,091.10 and 8,082.34 is: 12,116.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.86 : 31,091.10 = 8,082.34 : x
  2. Step 2: Convert to fraction form
    20,738.86/31,091.10 = 8,082.34/x
  3. Step 3: Cross multiply
    20,738.86x = 31,091.10 × 8,082.34
  4. Step 4: Simplify right side
    20,738.86x = 251,288,841.17
  5. Step 5: Solve for x
    x = 251,288,841.17/20,738.86
  6. Step 6: Final answer
    x = 12,116.81

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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.