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Finding the Fourth Proportional to 6,381.63, 8,811.05 and 3,992.67

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Solution

The fourth proportional to 6,381.63, 8,811.05 and 3,992.67 is: 5,512.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,381.63 : 8,811.05 = 3,992.67 : x
  2. Step 2: Convert to fraction form
    6,381.63/8,811.05 = 3,992.67/x
  3. Step 3: Cross multiply
    6,381.63x = 8,811.05 × 3,992.67
  4. Step 4: Simplify right side
    6,381.63x = 35,179,595.04
  5. Step 5: Solve for x
    x = 35,179,595.04/6,381.63
  6. Step 6: Final answer
    x = 5,512.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.