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Finding the Fourth Proportional to 8,660.94, 12,992.60 and 3,113.25

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Solution

The fourth proportional to 8,660.94, 12,992.60 and 3,113.25 is: 4,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.94 : 12,992.60 = 3,113.25 : x
  2. Step 2: Convert to fraction form
    8,660.94/12,992.60 = 3,113.25/x
  3. Step 3: Cross multiply
    8,660.94x = 12,992.60 × 3,113.25
  4. Step 4: Simplify right side
    8,660.94x = 40,449,219.73
  5. Step 5: Solve for x
    x = 40,449,219.73/8,660.94
  6. Step 6: Final answer
    x = 4,670.30

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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.