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Finding the Fourth Proportional to 18,804.37, 28,208.43 and 6,961.31

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Solution

The fourth proportional to 18,804.37, 28,208.43 and 6,961.31 is: 10,442.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.37 : 28,208.43 = 6,961.31 : x
  2. Step 2: Convert to fraction form
    18,804.37/28,208.43 = 6,961.31/x
  3. Step 3: Cross multiply
    18,804.37x = 28,208.43 × 6,961.31
  4. Step 4: Simplify right side
    18,804.37x = 196,367,625.84
  5. Step 5: Solve for x
    x = 196,367,625.84/18,804.37
  6. Step 6: Final answer
    x = 10,442.66

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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.