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Finding the Fourth Proportional to 12,485.44, 18,694.38 and 7,794.22

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Solution

The fourth proportional to 12,485.44, 18,694.38 and 7,794.22 is: 11,670.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.44 : 18,694.38 = 7,794.22 : x
  2. Step 2: Convert to fraction form
    12,485.44/18,694.38 = 7,794.22/x
  3. Step 3: Cross multiply
    12,485.44x = 18,694.38 × 7,794.22
  4. Step 4: Simplify right side
    12,485.44x = 145,708,110.48
  5. Step 5: Solve for x
    x = 145,708,110.48/12,485.44
  6. Step 6: Final answer
    x = 11,670.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.