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Finding the Fourth Proportional to 6,390.84, 8,817.32 and 3,873.96

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Solution

The fourth proportional to 6,390.84, 8,817.32 and 3,873.96 is: 5,344.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.84 : 8,817.32 = 3,873.96 : x
  2. Step 2: Convert to fraction form
    6,390.84/8,817.32 = 3,873.96/x
  3. Step 3: Cross multiply
    6,390.84x = 8,817.32 × 3,873.96
  4. Step 4: Simplify right side
    6,390.84x = 34,157,944.99
  5. Step 5: Solve for x
    x = 34,157,944.99/6,390.84
  6. Step 6: Final answer
    x = 5,344.83

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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.