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Finding the Fourth Proportional to 8,661.49, 12,993.59 and 2,816.73

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Solution

The fourth proportional to 8,661.49, 12,993.59 and 2,816.73 is: 4,225.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.49 : 12,993.59 = 2,816.73 : x
  2. Step 2: Convert to fraction form
    8,661.49/12,993.59 = 2,816.73/x
  3. Step 3: Cross multiply
    8,661.49x = 12,993.59 × 2,816.73
  4. Step 4: Simplify right side
    8,661.49x = 36,599,441.80
  5. Step 5: Solve for x
    x = 36,599,441.80/8,661.49
  6. Step 6: Final answer
    x = 4,225.54

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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.