Home / 20,818.22-31,212.72-7,668.90

Finding the Fourth Proportional to 20,818.22, 31,212.72 and 7,668.90

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Solution

The fourth proportional to 20,818.22, 31,212.72 and 7,668.90 is: 11,497.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.22 : 31,212.72 = 7,668.90 : x
  2. Step 2: Convert to fraction form
    20,818.22/31,212.72 = 7,668.90/x
  3. Step 3: Cross multiply
    20,818.22x = 31,212.72 × 7,668.90
  4. Step 4: Simplify right side
    20,818.22x = 239,367,228.41
  5. Step 5: Solve for x
    x = 239,367,228.41/20,818.22
  6. Step 6: Final answer
    x = 11,497.97

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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.