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Finding the Fourth Proportional to 18,290, 27,439.32 and 5,978

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Solution

The fourth proportional to 18,290, 27,439.32 and 5,978 is: 8,968.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,290 : 27,439.32 = 5,978 : x
  2. Step 2: Convert to fraction form
    18,290/27,439.32 = 5,978/x
  3. Step 3: Cross multiply
    18,290x = 27,439.32 × 5,978
  4. Step 4: Simplify right side
    18,290x = 164,032,254.96
  5. Step 5: Solve for x
    x = 164,032,254.96/18,290
  6. Step 6: Final answer
    x = 8,968.41

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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.