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Finding the Fourth Proportional to 25,449, 38,174.22 and 6,981

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Solution

The fourth proportional to 25,449, 38,174.22 and 6,981 is: 10,471.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,449 : 38,174.22 = 6,981 : x
  2. Step 2: Convert to fraction form
    25,449/38,174.22 = 6,981/x
  3. Step 3: Cross multiply
    25,449x = 38,174.22 × 6,981
  4. Step 4: Simplify right side
    25,449x = 266,494,229.82
  5. Step 5: Solve for x
    x = 266,494,229.82/25,449
  6. Step 6: Final answer
    x = 10,471.70

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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.