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Finding the Fourth Proportional to 18,419.60, 27,629.37 and 8,553.48

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Solution

The fourth proportional to 18,419.60, 27,629.37 and 8,553.48 is: 12,830.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419.60 : 27,629.37 = 8,553.48 : x
  2. Step 2: Convert to fraction form
    18,419.60/27,629.37 = 8,553.48/x
  3. Step 3: Cross multiply
    18,419.60x = 27,629.37 × 8,553.48
  4. Step 4: Simplify right side
    18,419.60x = 236,327,263.71
  5. Step 5: Solve for x
    x = 236,327,263.71/18,419.60
  6. Step 6: Final answer
    x = 12,830.21

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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.