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Finding the Fourth Proportional to 13,687.37, 18,881.78 and 8,840.43

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Solution

The fourth proportional to 13,687.37, 18,881.78 and 8,840.43 is: 12,195.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.37 : 18,881.78 = 8,840.43 : x
  2. Step 2: Convert to fraction form
    13,687.37/18,881.78 = 8,840.43/x
  3. Step 3: Cross multiply
    13,687.37x = 18,881.78 × 8,840.43
  4. Step 4: Simplify right side
    13,687.37x = 166,923,158.32
  5. Step 5: Solve for x
    x = 166,923,158.32/13,687.37
  6. Step 6: Final answer
    x = 12,195.41

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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.