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Finding the Fourth Proportional to 32,891.78, 45,375.26 and 21,558.26

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Solution

The fourth proportional to 32,891.78, 45,375.26 and 21,558.26 is: 29,740.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,891.78 : 45,375.26 = 21,558.26 : x
  2. Step 2: Convert to fraction form
    32,891.78/45,375.26 = 21,558.26/x
  3. Step 3: Cross multiply
    32,891.78x = 45,375.26 × 21,558.26
  4. Step 4: Simplify right side
    32,891.78x = 978,211,652.65
  5. Step 5: Solve for x
    x = 978,211,652.65/32,891.78
  6. Step 6: Final answer
    x = 29,740.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.