Home / 18,490.30-27,716.55-9,115.90

Finding the Fourth Proportional to 18,490.30, 27,716.55 and 9,115.90

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Solution

The fourth proportional to 18,490.30, 27,716.55 and 9,115.90 is: 13,664.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,490.30 : 27,716.55 = 9,115.90 : x
  2. Step 2: Convert to fraction form
    18,490.30/27,716.55 = 9,115.90/x
  3. Step 3: Cross multiply
    18,490.30x = 27,716.55 × 9,115.90
  4. Step 4: Simplify right side
    18,490.30x = 252,661,298.15
  5. Step 5: Solve for x
    x = 252,661,298.15/18,490.30
  6. Step 6: Final answer
    x = 13,664.53

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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.