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Finding the Fourth Proportional to 6,431.55, 8,879.52 and 4,936.60

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Solution

The fourth proportional to 6,431.55, 8,879.52 and 4,936.60 is: 6,815.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.55 : 8,879.52 = 4,936.60 : x
  2. Step 2: Convert to fraction form
    6,431.55/8,879.52 = 4,936.60/x
  3. Step 3: Cross multiply
    6,431.55x = 8,879.52 × 4,936.60
  4. Step 4: Simplify right side
    6,431.55x = 43,834,638.43
  5. Step 5: Solve for x
    x = 43,834,638.43/6,431.55
  6. Step 6: Final answer
    x = 6,815.56

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1.5x scale

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.