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Finding the Fourth Proportional to 18,642.15, 27,974.03 and 6,956.55

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Solution

The fourth proportional to 18,642.15, 27,974.03 and 6,956.55 is: 10,438.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.15 : 27,974.03 = 6,956.55 : x
  2. Step 2: Convert to fraction form
    18,642.15/27,974.03 = 6,956.55/x
  3. Step 3: Cross multiply
    18,642.15x = 27,974.03 × 6,956.55
  4. Step 4: Simplify right side
    18,642.15x = 194,602,703.61
  5. Step 5: Solve for x
    x = 194,602,703.61/18,642.15
  6. Step 6: Final answer
    x = 10,438.86

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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.