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Finding the Fourth Proportional to 18,145.40, 27,231.60 and 9,375.80

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Solution

The fourth proportional to 18,145.40, 27,231.60 and 9,375.80 is: 14,070.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,145.40 : 27,231.60 = 9,375.80 : x
  2. Step 2: Convert to fraction form
    18,145.40/27,231.60 = 9,375.80/x
  3. Step 3: Cross multiply
    18,145.40x = 27,231.60 × 9,375.80
  4. Step 4: Simplify right side
    18,145.40x = 255,318,035.28
  5. Step 5: Solve for x
    x = 255,318,035.28/18,145.40
  6. Step 6: Final answer
    x = 14,070.68

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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.