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Finding the Fourth Proportional to 6,387.84, 8,815.37 and 3,555.41

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Solution

The fourth proportional to 6,387.84, 8,815.37 and 3,555.41 is: 4,906.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.84 : 8,815.37 = 3,555.41 : x
  2. Step 2: Convert to fraction form
    6,387.84/8,815.37 = 3,555.41/x
  3. Step 3: Cross multiply
    6,387.84x = 8,815.37 × 3,555.41
  4. Step 4: Simplify right side
    6,387.84x = 31,342,192.80
  5. Step 5: Solve for x
    x = 31,342,192.80/6,387.84
  6. Step 6: Final answer
    x = 4,906.54

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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.