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Finding the Fourth Proportional to 18,369.30, 27,553.34 and 7,981.05

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Solution

The fourth proportional to 18,369.30, 27,553.34 and 7,981.05 is: 11,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,369.30 : 27,553.34 = 7,981.05 : x
  2. Step 2: Convert to fraction form
    18,369.30/27,553.34 = 7,981.05/x
  3. Step 3: Cross multiply
    18,369.30x = 27,553.34 × 7,981.05
  4. Step 4: Simplify right side
    18,369.30x = 219,904,406.54
  5. Step 5: Solve for x
    x = 219,904,406.54/18,369.30
  6. Step 6: Final answer
    x = 11,971.30

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1.5x scale

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.