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Finding the Fourth Proportional to 18,190.01, 25,103.24 and 12,129.79

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Solution

The fourth proportional to 18,190.01, 25,103.24 and 12,129.79 is: 16,739.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,190.01 : 25,103.24 = 12,129.79 : x
  2. Step 2: Convert to fraction form
    18,190.01/25,103.24 = 12,129.79/x
  3. Step 3: Cross multiply
    18,190.01x = 25,103.24 × 12,129.79
  4. Step 4: Simplify right side
    18,190.01x = 304,497,029.52
  5. Step 5: Solve for x
    x = 304,497,029.52/18,190.01
  6. Step 6: Final answer
    x = 16,739.79

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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.