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Finding the Fourth Proportional to 12,926.80, 17,840.92 and 7,893.94

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Solution

The fourth proportional to 12,926.80, 17,840.92 and 7,893.94 is: 10,894.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,926.80 : 17,840.92 = 7,893.94 : x
  2. Step 2: Convert to fraction form
    12,926.80/17,840.92 = 7,893.94/x
  3. Step 3: Cross multiply
    12,926.80x = 17,840.92 × 7,893.94
  4. Step 4: Simplify right side
    12,926.80x = 140,835,067.95
  5. Step 5: Solve for x
    x = 140,835,067.95/12,926.80
  6. Step 6: Final answer
    x = 10,894.81

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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.