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Finding the Fourth Proportional to 12,383.64, 18,571.14 and 4,986.18

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Solution

The fourth proportional to 12,383.64, 18,571.14 and 4,986.18 is: 7,477.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,383.64 : 18,571.14 = 4,986.18 : x
  2. Step 2: Convert to fraction form
    12,383.64/18,571.14 = 4,986.18/x
  3. Step 3: Cross multiply
    12,383.64x = 18,571.14 × 4,986.18
  4. Step 4: Simplify right side
    12,383.64x = 92,599,046.85
  5. Step 5: Solve for x
    x = 92,599,046.85/12,383.64
  6. Step 6: Final answer
    x = 7,477.53

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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.