Home / 20,818.28-31,212.81-7,668.96

Finding the Fourth Proportional to 20,818.28, 31,212.81 and 7,668.96

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Solution

The fourth proportional to 20,818.28, 31,212.81 and 7,668.96 is: 11,498.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.28 : 31,212.81 = 7,668.96 : x
  2. Step 2: Convert to fraction form
    20,818.28/31,212.81 = 7,668.96/x
  3. Step 3: Cross multiply
    20,818.28x = 31,212.81 × 7,668.96
  4. Step 4: Simplify right side
    20,818.28x = 239,369,791.38
  5. Step 5: Solve for x
    x = 239,369,791.38/20,818.28
  6. Step 6: Final answer
    x = 11,498.06

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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.