Home / 20,781.03-31,171.55-5,198.66

Finding the Fourth Proportional to 20,781.03, 31,171.55 and 5,198.66

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Solution

The fourth proportional to 20,781.03, 31,171.55 and 5,198.66 is: 7,797.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.03 : 31,171.55 = 5,198.66 : x
  2. Step 2: Convert to fraction form
    20,781.03/31,171.55 = 5,198.66/x
  3. Step 3: Cross multiply
    20,781.03x = 31,171.55 × 5,198.66
  4. Step 4: Simplify right side
    20,781.03x = 162,050,108.27
  5. Step 5: Solve for x
    x = 162,050,108.27/20,781.03
  6. Step 6: Final answer
    x = 7,797.98

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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.