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Finding the Fourth Proportional to 21,751.26, 32,621.78 and 12,267.68

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Solution

The fourth proportional to 21,751.26, 32,621.78 and 12,267.68 is: 18,398.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.26 : 32,621.78 = 12,267.68 : x
  2. Step 2: Convert to fraction form
    21,751.26/32,621.78 = 12,267.68/x
  3. Step 3: Cross multiply
    21,751.26x = 32,621.78 × 12,267.68
  4. Step 4: Simplify right side
    21,751.26x = 400,193,558.07
  5. Step 5: Solve for x
    x = 400,193,558.07/21,751.26
  6. Step 6: Final answer
    x = 18,398.64

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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.