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Finding the Fourth Proportional to 6,348.80, 8,759.31 and 4,112.39

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Solution

The fourth proportional to 6,348.80, 8,759.31 and 4,112.39 is: 5,673.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,348.80 : 8,759.31 = 4,112.39 : x
  2. Step 2: Convert to fraction form
    6,348.80/8,759.31 = 4,112.39/x
  3. Step 3: Cross multiply
    6,348.80x = 8,759.31 × 4,112.39
  4. Step 4: Simplify right side
    6,348.80x = 36,021,679.19
  5. Step 5: Solve for x
    x = 36,021,679.19/6,348.80
  6. Step 6: Final answer
    x = 5,673.78

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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.