Home / 8,619.33-12,929.28-2,379.81

Finding the Fourth Proportional to 8,619.33, 12,929.28 and 2,379.81

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Solution

The fourth proportional to 8,619.33, 12,929.28 and 2,379.81 is: 3,569.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.33 : 12,929.28 = 2,379.81 : x
  2. Step 2: Convert to fraction form
    8,619.33/12,929.28 = 2,379.81/x
  3. Step 3: Cross multiply
    8,619.33x = 12,929.28 × 2,379.81
  4. Step 4: Simplify right side
    8,619.33x = 30,769,217.94
  5. Step 5: Solve for x
    x = 30,769,217.94/8,619.33
  6. Step 6: Final answer
    x = 3,569.79

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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.