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Finding the Fourth Proportional to 3,953.52, 5,455.77 and 2,821.26

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Solution

The fourth proportional to 3,953.52, 5,455.77 and 2,821.26 is: 3,893.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.52 : 5,455.77 = 2,821.26 : x
  2. Step 2: Convert to fraction form
    3,953.52/5,455.77 = 2,821.26/x
  3. Step 3: Cross multiply
    3,953.52x = 5,455.77 × 2,821.26
  4. Step 4: Simplify right side
    3,953.52x = 15,392,145.67
  5. Step 5: Solve for x
    x = 15,392,145.67/3,953.52
  6. Step 6: Final answer
    x = 3,893.28

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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.