Home / 20,769.27-31,135.38-7,618.59

Finding the Fourth Proportional to 20,769.27, 31,135.38 and 7,618.59

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Solution

The fourth proportional to 20,769.27, 31,135.38 and 7,618.59 is: 11,421.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.27 : 31,135.38 = 7,618.59 : x
  2. Step 2: Convert to fraction form
    20,769.27/31,135.38 = 7,618.59/x
  3. Step 3: Cross multiply
    20,769.27x = 31,135.38 × 7,618.59
  4. Step 4: Simplify right side
    20,769.27x = 237,207,694.71
  5. Step 5: Solve for x
    x = 237,207,694.71/20,769.27
  6. Step 6: Final answer
    x = 11,421.09

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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.