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Finding the Fourth Proportional to 17,629.60, 26,445.60 and 5,620.80

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Solution

The fourth proportional to 17,629.60, 26,445.60 and 5,620.80 is: 8,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,629.60 : 26,445.60 = 5,620.80 : x
  2. Step 2: Convert to fraction form
    17,629.60/26,445.60 = 5,620.80/x
  3. Step 3: Cross multiply
    17,629.60x = 26,445.60 × 5,620.80
  4. Step 4: Simplify right side
    17,629.60x = 148,645,428.48
  5. Step 5: Solve for x
    x = 148,645,428.48/17,629.60
  6. Step 6: Final answer
    x = 8,431.58

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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.