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Finding the Fourth Proportional to 18,388.26, 27,558.15 and 7,288.89

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Solution

The fourth proportional to 18,388.26, 27,558.15 and 7,288.89 is: 10,923.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.26 : 27,558.15 = 7,288.89 : x
  2. Step 2: Convert to fraction form
    18,388.26/27,558.15 = 7,288.89/x
  3. Step 3: Cross multiply
    18,388.26x = 27,558.15 × 7,288.89
  4. Step 4: Simplify right side
    18,388.26x = 200,868,323.95
  5. Step 5: Solve for x
    x = 200,868,323.95/18,388.26
  6. Step 6: Final answer
    x = 10,923.73

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1.5x scale

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.