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Finding the Fourth Proportional to 6,388.56, 8,812.48 and 4,399

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Solution

The fourth proportional to 6,388.56, 8,812.48 and 4,399 is: 6,068.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.56 : 8,812.48 = 4,399 : x
  2. Step 2: Convert to fraction form
    6,388.56/8,812.48 = 4,399/x
  3. Step 3: Cross multiply
    6,388.56x = 8,812.48 × 4,399
  4. Step 4: Simplify right side
    6,388.56x = 38,766,099.52
  5. Step 5: Solve for x
    x = 38,766,099.52/6,388.56
  6. Step 6: Final answer
    x = 6,068.05

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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.