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Finding the Fourth Proportional to 18,758.62, 25,882.68 and 11,203.58

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Solution

The fourth proportional to 18,758.62, 25,882.68 and 11,203.58 is: 15,458.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.62 : 25,882.68 = 11,203.58 : x
  2. Step 2: Convert to fraction form
    18,758.62/25,882.68 = 11,203.58/x
  3. Step 3: Cross multiply
    18,758.62x = 25,882.68 × 11,203.58
  4. Step 4: Simplify right side
    18,758.62x = 289,978,675.99
  5. Step 5: Solve for x
    x = 289,978,675.99/18,758.62
  6. Step 6: Final answer
    x = 15,458.42

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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.