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Finding the Fourth Proportional to 6,385.05, 8,811.54 and 3,866.63

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Solution

The fourth proportional to 6,385.05, 8,811.54 and 3,866.63 is: 5,336.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,385.05 : 8,811.54 = 3,866.63 : x
  2. Step 2: Convert to fraction form
    6,385.05/8,811.54 = 3,866.63/x
  3. Step 3: Cross multiply
    6,385.05x = 8,811.54 × 3,866.63
  4. Step 4: Simplify right side
    6,385.05x = 34,070,920.85
  5. Step 5: Solve for x
    x = 34,070,920.85/6,385.05
  6. Step 6: Final answer
    x = 5,336.05

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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.