Home / 20,584.80-30,879.36-12,787.20

Finding the Fourth Proportional to 20,584.80, 30,879.36 and 12,787.20

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Solution

The fourth proportional to 20,584.80, 30,879.36 and 12,787.20 is: 19,182.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,584.80 : 30,879.36 = 12,787.20 : x
  2. Step 2: Convert to fraction form
    20,584.80/30,879.36 = 12,787.20/x
  3. Step 3: Cross multiply
    20,584.80x = 30,879.36 × 12,787.20
  4. Step 4: Simplify right side
    20,584.80x = 394,860,552.19
  5. Step 5: Solve for x
    x = 394,860,552.19/20,584.80
  6. Step 6: Final answer
    x = 19,182.14

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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.