Home / 20,382.30-30,504.33-12,180.06

Finding the Fourth Proportional to 20,382.30, 30,504.33 and 12,180.06

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Solution

The fourth proportional to 20,382.30, 30,504.33 and 12,180.06 is: 18,228.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.30 : 30,504.33 = 12,180.06 : x
  2. Step 2: Convert to fraction form
    20,382.30/30,504.33 = 12,180.06/x
  3. Step 3: Cross multiply
    20,382.30x = 30,504.33 × 12,180.06
  4. Step 4: Simplify right side
    20,382.30x = 371,544,569.66
  5. Step 5: Solve for x
    x = 371,544,569.66/20,382.30
  6. Step 6: Final answer
    x = 18,228.79

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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.