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Finding the Fourth Proportional to 15,063.72, 20,787.39 and 8,349.96

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Solution

The fourth proportional to 15,063.72, 20,787.39 and 8,349.96 is: 11,522.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,063.72 : 20,787.39 = 8,349.96 : x
  2. Step 2: Convert to fraction form
    15,063.72/20,787.39 = 8,349.96/x
  3. Step 3: Cross multiply
    15,063.72x = 20,787.39 × 8,349.96
  4. Step 4: Simplify right side
    15,063.72x = 173,573,875.00
  5. Step 5: Solve for x
    x = 173,573,875.00/15,063.72
  6. Step 6: Final answer
    x = 11,522.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.