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Finding the Fourth Proportional to 18,609.87, 27,885.61 and 15,825.09

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Solution

The fourth proportional to 18,609.87, 27,885.61 and 15,825.09 is: 23,712.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,609.87 : 27,885.61 = 15,825.09 : x
  2. Step 2: Convert to fraction form
    18,609.87/27,885.61 = 15,825.09/x
  3. Step 3: Cross multiply
    18,609.87x = 27,885.61 × 15,825.09
  4. Step 4: Simplify right side
    18,609.87x = 441,292,287.95
  5. Step 5: Solve for x
    x = 441,292,287.95/18,609.87
  6. Step 6: Final answer
    x = 23,712.81

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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.