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Finding the Fourth Proportional to 18,375.75, 25,358.94 and 9,992.25

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Solution

The fourth proportional to 18,375.75, 25,358.94 and 9,992.25 is: 13,789.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,375.75 : 25,358.94 = 9,992.25 : x
  2. Step 2: Convert to fraction form
    18,375.75/25,358.94 = 9,992.25/x
  3. Step 3: Cross multiply
    18,375.75x = 25,358.94 × 9,992.25
  4. Step 4: Simplify right side
    18,375.75x = 253,392,868.22
  5. Step 5: Solve for x
    x = 253,392,868.22/18,375.75
  6. Step 6: Final answer
    x = 13,789.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.