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Finding the Fourth Proportional to 12,394.32, 17,103.78 and 6,728.80

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Solution

The fourth proportional to 12,394.32, 17,103.78 and 6,728.80 is: 9,285.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,394.32 : 17,103.78 = 6,728.80 : x
  2. Step 2: Convert to fraction form
    12,394.32/17,103.78 = 6,728.80/x
  3. Step 3: Cross multiply
    12,394.32x = 17,103.78 × 6,728.80
  4. Step 4: Simplify right side
    12,394.32x = 115,087,914.86
  5. Step 5: Solve for x
    x = 115,087,914.86/12,394.32
  6. Step 6: Final answer
    x = 9,285.54

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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.