Home / 18,787.20-28,182.24-5,638.56

Finding the Fourth Proportional to 18,787.20, 28,182.24 and 5,638.56

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Solution

The fourth proportional to 18,787.20, 28,182.24 and 5,638.56 is: 8,458.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.20 : 28,182.24 = 5,638.56 : x
  2. Step 2: Convert to fraction form
    18,787.20/28,182.24 = 5,638.56/x
  3. Step 3: Cross multiply
    18,787.20x = 28,182.24 × 5,638.56
  4. Step 4: Simplify right side
    18,787.20x = 158,907,251.17
  5. Step 5: Solve for x
    x = 158,907,251.17/18,787.20
  6. Step 6: Final answer
    x = 8,458.27

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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.