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Finding the Fourth Proportional to 18,664.75, 27,997.67 and 4,813.75

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Solution

The fourth proportional to 18,664.75, 27,997.67 and 4,813.75 is: 7,220.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,664.75 : 27,997.67 = 4,813.75 : x
  2. Step 2: Convert to fraction form
    18,664.75/27,997.67 = 4,813.75/x
  3. Step 3: Cross multiply
    18,664.75x = 27,997.67 × 4,813.75
  4. Step 4: Simplify right side
    18,664.75x = 134,773,783.96
  5. Step 5: Solve for x
    x = 134,773,783.96/18,664.75
  6. Step 6: Final answer
    x = 7,220.77

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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.