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Finding the Fourth Proportional to 18,478.52, 27,709.30 and 6,791.80

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Solution

The fourth proportional to 18,478.52, 27,709.30 and 6,791.80 is: 10,184.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.52 : 27,709.30 = 6,791.80 : x
  2. Step 2: Convert to fraction form
    18,478.52/27,709.30 = 6,791.80/x
  3. Step 3: Cross multiply
    18,478.52x = 27,709.30 × 6,791.80
  4. Step 4: Simplify right side
    18,478.52x = 188,196,023.74
  5. Step 5: Solve for x
    x = 188,196,023.74/18,478.52
  6. Step 6: Final answer
    x = 10,184.58

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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.