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Finding the Fourth Proportional to 18,604.86, 27,910.80 and 11,984.46

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Solution

The fourth proportional to 18,604.86, 27,910.80 and 11,984.46 is: 17,978.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,604.86 : 27,910.80 = 11,984.46 : x
  2. Step 2: Convert to fraction form
    18,604.86/27,910.80 = 11,984.46/x
  3. Step 3: Cross multiply
    18,604.86x = 27,910.80 × 11,984.46
  4. Step 4: Simplify right side
    18,604.86x = 334,495,866.17
  5. Step 5: Solve for x
    x = 334,495,866.17/18,604.86
  6. Step 6: Final answer
    x = 17,978.95

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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.