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Finding the Fourth Proportional to 8,528.40, 12,794.40 and 2,685.60

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Solution

The fourth proportional to 8,528.40, 12,794.40 and 2,685.60 is: 4,028.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,528.40 : 12,794.40 = 2,685.60 : x
  2. Step 2: Convert to fraction form
    8,528.40/12,794.40 = 2,685.60/x
  3. Step 3: Cross multiply
    8,528.40x = 12,794.40 × 2,685.60
  4. Step 4: Simplify right side
    8,528.40x = 34,360,640.64
  5. Step 5: Solve for x
    x = 34,360,640.64/8,528.40
  6. Step 6: Final answer
    x = 4,028.97

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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.