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Finding the Fourth Proportional to 18,143.90, 27,145.11 and 15,904.96

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Solution

The fourth proportional to 18,143.90, 27,145.11 and 15,904.96 is: 23,795.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,143.90 : 27,145.11 = 15,904.96 : x
  2. Step 2: Convert to fraction form
    18,143.90/27,145.11 = 15,904.96/x
  3. Step 3: Cross multiply
    18,143.90x = 27,145.11 × 15,904.96
  4. Step 4: Simplify right side
    18,143.90x = 431,741,858.16
  5. Step 5: Solve for x
    x = 431,741,858.16/18,143.90
  6. Step 6: Final answer
    x = 23,795.43

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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.