Home / 12,843.90-17,724.60-7,178.55

Finding the Fourth Proportional to 12,843.90, 17,724.60 and 7,178.55

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Solution

The fourth proportional to 12,843.90, 17,724.60 and 7,178.55 is: 9,906.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,843.90 : 17,724.60 = 7,178.55 : x
  2. Step 2: Convert to fraction form
    12,843.90/17,724.60 = 7,178.55/x
  3. Step 3: Cross multiply
    12,843.90x = 17,724.60 × 7,178.55
  4. Step 4: Simplify right side
    12,843.90x = 127,236,927.33
  5. Step 5: Solve for x
    x = 127,236,927.33/12,843.90
  6. Step 6: Final answer
    x = 9,906.41

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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.