Home / 18,815.91-28,222.52-7,719.59

Finding the Fourth Proportional to 18,815.91, 28,222.52 and 7,719.59

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Solution

The fourth proportional to 18,815.91, 28,222.52 and 7,719.59 is: 11,578.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.91 : 28,222.52 = 7,719.59 : x
  2. Step 2: Convert to fraction form
    18,815.91/28,222.52 = 7,719.59/x
  3. Step 3: Cross multiply
    18,815.91x = 28,222.52 × 7,719.59
  4. Step 4: Simplify right side
    18,815.91x = 217,866,103.46
  5. Step 5: Solve for x
    x = 217,866,103.46/18,815.91
  6. Step 6: Final answer
    x = 11,578.82

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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.