Home / 20,789.58-31,186.38-8,306.64

Finding the Fourth Proportional to 20,789.58, 31,186.38 and 8,306.64

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Solution

The fourth proportional to 20,789.58, 31,186.38 and 8,306.64 is: 12,460.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.58 : 31,186.38 = 8,306.64 : x
  2. Step 2: Convert to fraction form
    20,789.58/31,186.38 = 8,306.64/x
  3. Step 3: Cross multiply
    20,789.58x = 31,186.38 × 8,306.64
  4. Step 4: Simplify right side
    20,789.58x = 259,054,031.56
  5. Step 5: Solve for x
    x = 259,054,031.56/20,789.58
  6. Step 6: Final answer
    x = 12,460.76

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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.