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Finding the Fourth Proportional to 8,485.80, 12,735.90 and 6,844.20

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Solution

The fourth proportional to 8,485.80, 12,735.90 and 6,844.20 is: 10,272.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.80 : 12,735.90 = 6,844.20 : x
  2. Step 2: Convert to fraction form
    8,485.80/12,735.90 = 6,844.20/x
  3. Step 3: Cross multiply
    8,485.80x = 12,735.90 × 6,844.20
  4. Step 4: Simplify right side
    8,485.80x = 87,167,046.78
  5. Step 5: Solve for x
    x = 87,167,046.78/8,485.80
  6. Step 6: Final answer
    x = 10,272.11

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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.