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Finding the Fourth Proportional to 5,818.80, 8,728.20 and 5,786.40

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Solution

The fourth proportional to 5,818.80, 8,728.20 and 5,786.40 is: 8,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,818.80 : 8,728.20 = 5,786.40 : x
  2. Step 2: Convert to fraction form
    5,818.80/8,728.20 = 5,786.40/x
  3. Step 3: Cross multiply
    5,818.80x = 8,728.20 × 5,786.40
  4. Step 4: Simplify right side
    5,818.80x = 50,504,856.48
  5. Step 5: Solve for x
    x = 50,504,856.48/5,818.80
  6. Step 6: Final answer
    x = 8,679.60

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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.