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Finding the Fourth Proportional to 8,661.37, 12,993.41 and 2,816.61

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Solution

The fourth proportional to 8,661.37, 12,993.41 and 2,816.61 is: 4,225.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.37 : 12,993.41 = 2,816.61 : x
  2. Step 2: Convert to fraction form
    8,661.37/12,993.41 = 2,816.61/x
  3. Step 3: Cross multiply
    8,661.37x = 12,993.41 × 2,816.61
  4. Step 4: Simplify right side
    8,661.37x = 36,597,289.49
  5. Step 5: Solve for x
    x = 36,597,289.49/8,661.37
  6. Step 6: Final answer
    x = 4,225.35

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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.