Home / 20,789.98-31,197.26-7,651.57

Finding the Fourth Proportional to 20,789.98, 31,197.26 and 7,651.57

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Solution

The fourth proportional to 20,789.98, 31,197.26 and 7,651.57 is: 11,481.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.98 : 31,197.26 = 7,651.57 : x
  2. Step 2: Convert to fraction form
    20,789.98/31,197.26 = 7,651.57/x
  3. Step 3: Cross multiply
    20,789.98x = 31,197.26 × 7,651.57
  4. Step 4: Simplify right side
    20,789.98x = 238,708,018.70
  5. Step 5: Solve for x
    x = 238,708,018.70/20,789.98
  6. Step 6: Final answer
    x = 11,481.88

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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.