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Finding the Fourth Proportional to 3,638.88, 5,021.76 and 2,066.92

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Solution

The fourth proportional to 3,638.88, 5,021.76 and 2,066.92 is: 2,852.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.88 : 5,021.76 = 2,066.92 : x
  2. Step 2: Convert to fraction form
    3,638.88/5,021.76 = 2,066.92/x
  3. Step 3: Cross multiply
    3,638.88x = 5,021.76 × 2,066.92
  4. Step 4: Simplify right side
    3,638.88x = 10,379,576.18
  5. Step 5: Solve for x
    x = 10,379,576.18/3,638.88
  6. Step 6: Final answer
    x = 2,852.41

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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.