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Finding the Fourth Proportional to 8,388.77, 12,571.81 and 3,191.81

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Solution

The fourth proportional to 8,388.77, 12,571.81 and 3,191.81 is: 4,783.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388.77 : 12,571.81 = 3,191.81 : x
  2. Step 2: Convert to fraction form
    8,388.77/12,571.81 = 3,191.81/x
  3. Step 3: Cross multiply
    8,388.77x = 12,571.81 × 3,191.81
  4. Step 4: Simplify right side
    8,388.77x = 40,126,758.04
  5. Step 5: Solve for x
    x = 40,126,758.04/8,388.77
  6. Step 6: Final answer
    x = 4,783.39

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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.