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Finding the Fourth Proportional to 18,793.56, 25,928.67 and 10,721.42

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Solution

The fourth proportional to 18,793.56, 25,928.67 and 10,721.42 is: 14,791.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.56 : 25,928.67 = 10,721.42 : x
  2. Step 2: Convert to fraction form
    18,793.56/25,928.67 = 10,721.42/x
  3. Step 3: Cross multiply
    18,793.56x = 25,928.67 × 10,721.42
  4. Step 4: Simplify right side
    18,793.56x = 277,992,161.11
  5. Step 5: Solve for x
    x = 277,992,161.11/18,793.56
  6. Step 6: Final answer
    x = 14,791.88

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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.