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Finding the Fourth Proportional to 18,008.60, 26,997.14 and 8,643.96

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Solution

The fourth proportional to 18,008.60, 26,997.14 and 8,643.96 is: 12,958.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,008.60 : 26,997.14 = 8,643.96 : x
  2. Step 2: Convert to fraction form
    18,008.60/26,997.14 = 8,643.96/x
  3. Step 3: Cross multiply
    18,008.60x = 26,997.14 × 8,643.96
  4. Step 4: Simplify right side
    18,008.60x = 233,362,198.27
  5. Step 5: Solve for x
    x = 233,362,198.27/18,008.60
  6. Step 6: Final answer
    x = 12,958.38

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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.