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Finding the Fourth Proportional to 3,857.96, 5,326.44 and 2,972.12

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Solution

The fourth proportional to 3,857.96, 5,326.44 and 2,972.12 is: 4,103.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.96 : 5,326.44 = 2,972.12 : x
  2. Step 2: Convert to fraction form
    3,857.96/5,326.44 = 2,972.12/x
  3. Step 3: Cross multiply
    3,857.96x = 5,326.44 × 2,972.12
  4. Step 4: Simplify right side
    3,857.96x = 15,830,818.85
  5. Step 5: Solve for x
    x = 15,830,818.85/3,857.96
  6. Step 6: Final answer
    x = 4,103.42

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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.