Home / 13,781.03-20,672.23-3,921.76

Finding the Fourth Proportional to 13,781.03, 20,672.23 and 3,921.76

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Solution

The fourth proportional to 13,781.03, 20,672.23 and 3,921.76 is: 5,882.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.03 : 20,672.23 = 3,921.76 : x
  2. Step 2: Convert to fraction form
    13,781.03/20,672.23 = 3,921.76/x
  3. Step 3: Cross multiply
    13,781.03x = 20,672.23 × 3,921.76
  4. Step 4: Simplify right side
    13,781.03x = 81,071,524.72
  5. Step 5: Solve for x
    x = 81,071,524.72/13,781.03
  6. Step 6: Final answer
    x = 5,882.83

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1.5x scale

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.