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Finding the Fourth Proportional to 3,881.54, 5,351.54 and 2,820.85

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Solution

The fourth proportional to 3,881.54, 5,351.54 and 2,820.85 is: 3,889.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.54 : 5,351.54 = 2,820.85 : x
  2. Step 2: Convert to fraction form
    3,881.54/5,351.54 = 2,820.85/x
  3. Step 3: Cross multiply
    3,881.54x = 5,351.54 × 2,820.85
  4. Step 4: Simplify right side
    3,881.54x = 15,095,864.13
  5. Step 5: Solve for x
    x = 15,095,864.13/3,881.54
  6. Step 6: Final answer
    x = 3,889.14

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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.