Home / 20,987.73-31,481.55-7,841.13

Finding the Fourth Proportional to 20,987.73, 31,481.55 and 7,841.13

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Solution

The fourth proportional to 20,987.73, 31,481.55 and 7,841.13 is: 11,761.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.73 : 31,481.55 = 7,841.13 : x
  2. Step 2: Convert to fraction form
    20,987.73/31,481.55 = 7,841.13/x
  3. Step 3: Cross multiply
    20,987.73x = 31,481.55 × 7,841.13
  4. Step 4: Simplify right side
    20,987.73x = 246,850,926.15
  5. Step 5: Solve for x
    x = 246,850,926.15/20,987.73
  6. Step 6: Final answer
    x = 11,761.68

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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.