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Finding the Fourth Proportional to 18,376.60, 27,564.90 and 11,815.60

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Solution

The fourth proportional to 18,376.60, 27,564.90 and 11,815.60 is: 17,723.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,376.60 : 27,564.90 = 11,815.60 : x
  2. Step 2: Convert to fraction form
    18,376.60/27,564.90 = 11,815.60/x
  3. Step 3: Cross multiply
    18,376.60x = 27,564.90 × 11,815.60
  4. Step 4: Simplify right side
    18,376.60x = 325,695,832.44
  5. Step 5: Solve for x
    x = 325,695,832.44/18,376.60
  6. Step 6: Final answer
    x = 17,723.40

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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.