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Finding the Fourth Proportional to 21,858.68, 32,789.46 and 6,276.44

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Solution

The fourth proportional to 21,858.68, 32,789.46 and 6,276.44 is: 9,415.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.68 : 32,789.46 = 6,276.44 : x
  2. Step 2: Convert to fraction form
    21,858.68/32,789.46 = 6,276.44/x
  3. Step 3: Cross multiply
    21,858.68x = 32,789.46 × 6,276.44
  4. Step 4: Simplify right side
    21,858.68x = 205,801,078.32
  5. Step 5: Solve for x
    x = 205,801,078.32/21,858.68
  6. Step 6: Final answer
    x = 9,415.07

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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.