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Finding the Fourth Proportional to 18,018.78, 27,029.21 and 4,872.21

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Solution

The fourth proportional to 18,018.78, 27,029.21 and 4,872.21 is: 7,308.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,018.78 : 27,029.21 = 4,872.21 : x
  2. Step 2: Convert to fraction form
    18,018.78/27,029.21 = 4,872.21/x
  3. Step 3: Cross multiply
    18,018.78x = 27,029.21 × 4,872.21
  4. Step 4: Simplify right side
    18,018.78x = 131,691,962.89
  5. Step 5: Solve for x
    x = 131,691,962.89/18,018.78
  6. Step 6: Final answer
    x = 7,308.59

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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.