Home / 20,722.70-31,060.97-8,239.39

Finding the Fourth Proportional to 20,722.70, 31,060.97 and 8,239.39

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Solution

The fourth proportional to 20,722.70, 31,060.97 and 8,239.39 is: 12,349.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.70 : 31,060.97 = 8,239.39 : x
  2. Step 2: Convert to fraction form
    20,722.70/31,060.97 = 8,239.39/x
  3. Step 3: Cross multiply
    20,722.70x = 31,060.97 × 8,239.39
  4. Step 4: Simplify right side
    20,722.70x = 255,923,357.66
  5. Step 5: Solve for x
    x = 255,923,357.66/20,722.70
  6. Step 6: Final answer
    x = 12,349.90

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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.