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Finding the Fourth Proportional to 18,604.20, 27,870.66 and 17,978.88

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Solution

The fourth proportional to 18,604.20, 27,870.66 and 17,978.88 is: 26,933.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,604.20 : 27,870.66 = 17,978.88 : x
  2. Step 2: Convert to fraction form
    18,604.20/27,870.66 = 17,978.88/x
  3. Step 3: Cross multiply
    18,604.20x = 27,870.66 × 17,978.88
  4. Step 4: Simplify right side
    18,604.20x = 501,083,251.66
  5. Step 5: Solve for x
    x = 501,083,251.66/18,604.20
  6. Step 6: Final answer
    x = 26,933.88

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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.