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Finding the Fourth Proportional to 18,787.91, 28,182.32 and 6,308.34

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Solution

The fourth proportional to 18,787.91, 28,182.32 and 6,308.34 is: 9,462.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.91 : 28,182.32 = 6,308.34 : x
  2. Step 2: Convert to fraction form
    18,787.91/28,182.32 = 6,308.34/x
  3. Step 3: Cross multiply
    18,787.91x = 28,182.32 × 6,308.34
  4. Step 4: Simplify right side
    18,787.91x = 177,783,648.66
  5. Step 5: Solve for x
    x = 177,783,648.66/18,787.91
  6. Step 6: Final answer
    x = 9,462.66

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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.