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Finding the Fourth Proportional to 12,843.93, 17,724.57 and 7,178.68

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Solution

The fourth proportional to 12,843.93, 17,724.57 and 7,178.68 is: 9,906.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,843.93 : 17,724.57 = 7,178.68 : x
  2. Step 2: Convert to fraction form
    12,843.93/17,724.57 = 7,178.68/x
  3. Step 3: Cross multiply
    12,843.93x = 17,724.57 × 7,178.68
  4. Step 4: Simplify right side
    12,843.93x = 127,238,952.08
  5. Step 5: Solve for x
    x = 127,238,952.08/12,843.93
  6. Step 6: Final answer
    x = 9,906.54

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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.