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Finding the Fourth Proportional to 6,528.90, 9,793.35 and 1,911.90

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Solution

The fourth proportional to 6,528.90, 9,793.35 and 1,911.90 is: 2,867.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,528.90 : 9,793.35 = 1,911.90 : x
  2. Step 2: Convert to fraction form
    6,528.90/9,793.35 = 1,911.90/x
  3. Step 3: Cross multiply
    6,528.90x = 9,793.35 × 1,911.90
  4. Step 4: Simplify right side
    6,528.90x = 18,723,905.87
  5. Step 5: Solve for x
    x = 18,723,905.87/6,528.90
  6. Step 6: Final answer
    x = 2,867.85

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Double scale
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Similar ratio
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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.