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Finding the Fourth Proportional to 6,181.80, 9,279.90 and 6,138.60

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Solution

The fourth proportional to 6,181.80, 9,279.90 and 6,138.60 is: 9,215.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,181.80 : 9,279.90 = 6,138.60 : x
  2. Step 2: Convert to fraction form
    6,181.80/9,279.90 = 6,138.60/x
  3. Step 3: Cross multiply
    6,181.80x = 9,279.90 × 6,138.60
  4. Step 4: Simplify right side
    6,181.80x = 56,965,594.14
  5. Step 5: Solve for x
    x = 56,965,594.14/6,181.80
  6. Step 6: Final answer
    x = 9,215.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.