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Finding the Fourth Proportional to 18,268.60, 27,403.90 and 8,916.60

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Solution

The fourth proportional to 18,268.60, 27,403.90 and 8,916.60 is: 13,375.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,268.60 : 27,403.90 = 8,916.60 : x
  2. Step 2: Convert to fraction form
    18,268.60/27,403.90 = 8,916.60/x
  3. Step 3: Cross multiply
    18,268.60x = 27,403.90 × 8,916.60
  4. Step 4: Simplify right side
    18,268.60x = 244,349,614.74
  5. Step 5: Solve for x
    x = 244,349,614.74/18,268.60
  6. Step 6: Final answer
    x = 13,375.39

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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.