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Finding the Fourth Proportional to 28,893.60, 43,342.80 and 9,171.60

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Solution

The fourth proportional to 28,893.60, 43,342.80 and 9,171.60 is: 13,758.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,893.60 : 43,342.80 = 9,171.60 : x
  2. Step 2: Convert to fraction form
    28,893.60/43,342.80 = 9,171.60/x
  3. Step 3: Cross multiply
    28,893.60x = 43,342.80 × 9,171.60
  4. Step 4: Simplify right side
    28,893.60x = 397,522,824.48
  5. Step 5: Solve for x
    x = 397,522,824.48/28,893.60
  6. Step 6: Final answer
    x = 13,758.16

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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.