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Finding the Fourth Proportional to 18,604.38, 25,659.89 and 12,939.14

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Solution

The fourth proportional to 18,604.38, 25,659.89 and 12,939.14 is: 17,846.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,604.38 : 25,659.89 = 12,939.14 : x
  2. Step 2: Convert to fraction form
    18,604.38/25,659.89 = 12,939.14/x
  3. Step 3: Cross multiply
    18,604.38x = 25,659.89 × 12,939.14
  4. Step 4: Simplify right side
    18,604.38x = 332,016,957.07
  5. Step 5: Solve for x
    x = 332,016,957.07/18,604.38
  6. Step 6: Final answer
    x = 17,846.17

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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.