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Finding the Fourth Proportional to 6,394.95, 8,821.30 and 4,405.39

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Solution

The fourth proportional to 6,394.95, 8,821.30 and 4,405.39 is: 6,076.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,394.95 : 8,821.30 = 4,405.39 : x
  2. Step 2: Convert to fraction form
    6,394.95/8,821.30 = 4,405.39/x
  3. Step 3: Cross multiply
    6,394.95x = 8,821.30 × 4,405.39
  4. Step 4: Simplify right side
    6,394.95x = 38,861,200.67
  5. Step 5: Solve for x
    x = 38,861,200.67/6,394.95
  6. Step 6: Final answer
    x = 6,076.86

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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.