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Finding the Fourth Proportional to 6,387.81, 8,815.26 and 3,555.30

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Solution

The fourth proportional to 6,387.81, 8,815.26 and 3,555.30 is: 4,906.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.81 : 8,815.26 = 3,555.30 : x
  2. Step 2: Convert to fraction form
    6,387.81/8,815.26 = 3,555.30/x
  3. Step 3: Cross multiply
    6,387.81x = 8,815.26 × 3,555.30
  4. Step 4: Simplify right side
    6,387.81x = 31,340,889.38
  5. Step 5: Solve for x
    x = 31,340,889.38/6,387.81
  6. Step 6: Final answer
    x = 4,906.36

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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.