Home / 20,143.44-30,205.85-10,781.82

Finding the Fourth Proportional to 20,143.44, 30,205.85 and 10,781.82

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Solution

The fourth proportional to 20,143.44, 30,205.85 and 10,781.82 is: 16,167.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.44 : 30,205.85 = 10,781.82 : x
  2. Step 2: Convert to fraction form
    20,143.44/30,205.85 = 10,781.82/x
  3. Step 3: Cross multiply
    20,143.44x = 30,205.85 × 10,781.82
  4. Step 4: Simplify right side
    20,143.44x = 325,673,983.74
  5. Step 5: Solve for x
    x = 325,673,983.74/20,143.44
  6. Step 6: Final answer
    x = 16,167.74

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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.