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Finding the Fourth Proportional to 8,181.80, 11,290.80 and 4,455.80

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Solution

The fourth proportional to 8,181.80, 11,290.80 and 4,455.80 is: 6,148.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,181.80 : 11,290.80 = 4,455.80 : x
  2. Step 2: Convert to fraction form
    8,181.80/11,290.80 = 4,455.80/x
  3. Step 3: Cross multiply
    8,181.80x = 11,290.80 × 4,455.80
  4. Step 4: Simplify right side
    8,181.80x = 50,309,546.64
  5. Step 5: Solve for x
    x = 50,309,546.64/8,181.80
  6. Step 6: Final answer
    x = 6,148.96

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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.