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Finding the Fourth Proportional to 18,702.78, 27,984.87 and 14,993.79

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Solution

The fourth proportional to 18,702.78, 27,984.87 and 14,993.79 is: 22,435.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.78 : 27,984.87 = 14,993.79 : x
  2. Step 2: Convert to fraction form
    18,702.78/27,984.87 = 14,993.79/x
  3. Step 3: Cross multiply
    18,702.78x = 27,984.87 × 14,993.79
  4. Step 4: Simplify right side
    18,702.78x = 419,599,263.96
  5. Step 5: Solve for x
    x = 419,599,263.96/18,702.78
  6. Step 6: Final answer
    x = 22,435.13

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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.