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Finding the Fourth Proportional to 28,808.52, 43,218.63 and 12,168.60

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Solution

The fourth proportional to 28,808.52, 43,218.63 and 12,168.60 is: 18,255.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,808.52 : 43,218.63 = 12,168.60 : x
  2. Step 2: Convert to fraction form
    28,808.52/43,218.63 = 12,168.60/x
  3. Step 3: Cross multiply
    28,808.52x = 43,218.63 × 12,168.60
  4. Step 4: Simplify right side
    28,808.52x = 525,910,221.02
  5. Step 5: Solve for x
    x = 525,910,221.02/28,808.52
  6. Step 6: Final answer
    x = 18,255.37

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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.