Home / 12,500.78-18,757.26-5,479.83

Finding the Fourth Proportional to 12,500.78, 18,757.26 and 5,479.83

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Solution

The fourth proportional to 12,500.78, 18,757.26 and 5,479.83 is: 8,222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,500.78 : 18,757.26 = 5,479.83 : x
  2. Step 2: Convert to fraction form
    12,500.78/18,757.26 = 5,479.83/x
  3. Step 3: Cross multiply
    12,500.78x = 18,757.26 × 5,479.83
  4. Step 4: Simplify right side
    12,500.78x = 102,786,596.07
  5. Step 5: Solve for x
    x = 102,786,596.07/12,500.78
  6. Step 6: Final answer
    x = 8,222.42

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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.