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Finding the Fourth Proportional to 6,771.78, 9,338.58 and 4,378.68

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Solution

The fourth proportional to 6,771.78, 9,338.58 and 4,378.68 is: 6,038.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,771.78 : 9,338.58 = 4,378.68 : x
  2. Step 2: Convert to fraction form
    6,771.78/9,338.58 = 4,378.68/x
  3. Step 3: Cross multiply
    6,771.78x = 9,338.58 × 4,378.68
  4. Step 4: Simplify right side
    6,771.78x = 40,890,653.47
  5. Step 5: Solve for x
    x = 40,890,653.47/6,771.78
  6. Step 6: Final answer
    x = 6,038.39

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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.