Home / 20,585.75-30,919.95-12,281.97

Finding the Fourth Proportional to 20,585.75, 30,919.95 and 12,281.97

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Solution

The fourth proportional to 20,585.75, 30,919.95 and 12,281.97 is: 18,447.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.75 : 30,919.95 = 12,281.97 : x
  2. Step 2: Convert to fraction form
    20,585.75/30,919.95 = 12,281.97/x
  3. Step 3: Cross multiply
    20,585.75x = 30,919.95 × 12,281.97
  4. Step 4: Simplify right side
    20,585.75x = 379,757,898.30
  5. Step 5: Solve for x
    x = 379,757,898.30/20,585.75
  6. Step 6: Final answer
    x = 18,447.61

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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.