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Finding the Fourth Proportional to 3,806.73, 5,253.03 and 2,128.05

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Solution

The fourth proportional to 3,806.73, 5,253.03 and 2,128.05 is: 2,936.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,806.73 : 5,253.03 = 2,128.05 : x
  2. Step 2: Convert to fraction form
    3,806.73/5,253.03 = 2,128.05/x
  3. Step 3: Cross multiply
    3,806.73x = 5,253.03 × 2,128.05
  4. Step 4: Simplify right side
    3,806.73x = 11,178,710.49
  5. Step 5: Solve for x
    x = 11,178,710.49/3,806.73
  6. Step 6: Final answer
    x = 2,936.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.