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Finding the Fourth Proportional to 12,893.22, 17,791.04 and 7,855.60

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Solution

The fourth proportional to 12,893.22, 17,791.04 and 7,855.60 is: 10,839.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,893.22 : 17,791.04 = 7,855.60 : x
  2. Step 2: Convert to fraction form
    12,893.22/17,791.04 = 7,855.60/x
  3. Step 3: Cross multiply
    12,893.22x = 17,791.04 × 7,855.60
  4. Step 4: Simplify right side
    12,893.22x = 139,759,293.82
  5. Step 5: Solve for x
    x = 139,759,293.82/12,893.22
  6. Step 6: Final answer
    x = 10,839.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.