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Finding the Fourth Proportional to 8,100.50, 12,150.75 and 2,628.50

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Solution

The fourth proportional to 8,100.50, 12,150.75 and 2,628.50 is: 3,942.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,100.50 : 12,150.75 = 2,628.50 : x
  2. Step 2: Convert to fraction form
    8,100.50/12,150.75 = 2,628.50/x
  3. Step 3: Cross multiply
    8,100.50x = 12,150.75 × 2,628.50
  4. Step 4: Simplify right side
    8,100.50x = 31,938,246.38
  5. Step 5: Solve for x
    x = 31,938,246.38/8,100.50
  6. Step 6: Final answer
    x = 3,942.75

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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.