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Finding the Fourth Proportional to 8,200.80, 12,301.20 and 5,282.40

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Solution

The fourth proportional to 8,200.80, 12,301.20 and 5,282.40 is: 7,923.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,200.80 : 12,301.20 = 5,282.40 : x
  2. Step 2: Convert to fraction form
    8,200.80/12,301.20 = 5,282.40/x
  3. Step 3: Cross multiply
    8,200.80x = 12,301.20 × 5,282.40
  4. Step 4: Simplify right side
    8,200.80x = 64,979,858.88
  5. Step 5: Solve for x
    x = 64,979,858.88/8,200.80
  6. Step 6: Final answer
    x = 7,923.60

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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.