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Finding the Fourth Proportional to 28,791.60, 43,163.40 and 12,164.40

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Solution

The fourth proportional to 28,791.60, 43,163.40 and 12,164.40 is: 18,236.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,791.60 : 43,163.40 = 12,164.40 : x
  2. Step 2: Convert to fraction form
    28,791.60/43,163.40 = 12,164.40/x
  3. Step 3: Cross multiply
    28,791.60x = 43,163.40 × 12,164.40
  4. Step 4: Simplify right side
    28,791.60x = 525,056,862.96
  5. Step 5: Solve for x
    x = 525,056,862.96/28,791.60
  6. Step 6: Final answer
    x = 18,236.46

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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.