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Finding the Fourth Proportional to 18,638.48, 27,957.72 and 4,787.48

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Solution

The fourth proportional to 18,638.48, 27,957.72 and 4,787.48 is: 7,181.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.48 : 27,957.72 = 4,787.48 : x
  2. Step 2: Convert to fraction form
    18,638.48/27,957.72 = 4,787.48/x
  3. Step 3: Cross multiply
    18,638.48x = 27,957.72 × 4,787.48
  4. Step 4: Simplify right side
    18,638.48x = 133,847,025.35
  5. Step 5: Solve for x
    x = 133,847,025.35/18,638.48
  6. Step 6: Final answer
    x = 7,181.22

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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.