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Finding the Fourth Proportional to 6,388.88, 8,817.48 and 3,871.93

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Solution

The fourth proportional to 6,388.88, 8,817.48 and 3,871.93 is: 5,343.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.88 : 8,817.48 = 3,871.93 : x
  2. Step 2: Convert to fraction form
    6,388.88/8,817.48 = 3,871.93/x
  3. Step 3: Cross multiply
    6,388.88x = 8,817.48 × 3,871.93
  4. Step 4: Simplify right side
    6,388.88x = 34,140,645.92
  5. Step 5: Solve for x
    x = 34,140,645.92/6,388.88
  6. Step 6: Final answer
    x = 5,343.76

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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.