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Finding the Fourth Proportional to 18,052.40, 27,074.55 and 11,855.90

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Solution

The fourth proportional to 18,052.40, 27,074.55 and 11,855.90 is: 17,781.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,052.40 : 27,074.55 = 11,855.90 : x
  2. Step 2: Convert to fraction form
    18,052.40/27,074.55 = 11,855.90/x
  3. Step 3: Cross multiply
    18,052.40x = 27,074.55 × 11,855.90
  4. Step 4: Simplify right side
    18,052.40x = 320,993,157.35
  5. Step 5: Solve for x
    x = 320,993,157.35/18,052.40
  6. Step 6: Final answer
    x = 17,781.19

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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.