Home / 20,820.62-31,233.12-6,781.74

Finding the Fourth Proportional to 20,820.62, 31,233.12 and 6,781.74

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Solution

The fourth proportional to 20,820.62, 31,233.12 and 6,781.74 is: 10,173.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.62 : 31,233.12 = 6,781.74 : x
  2. Step 2: Convert to fraction form
    20,820.62/31,233.12 = 6,781.74/x
  3. Step 3: Cross multiply
    20,820.62x = 31,233.12 × 6,781.74
  4. Step 4: Simplify right side
    20,820.62x = 211,814,945.08
  5. Step 5: Solve for x
    x = 211,814,945.08/20,820.62
  6. Step 6: Final answer
    x = 10,173.33

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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.