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Finding the Fourth Proportional to 3,891.04, 5,406.94 and 3,851.08

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Solution

The fourth proportional to 3,891.04, 5,406.94 and 3,851.08 is: 5,351.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.04 : 5,406.94 = 3,851.08 : x
  2. Step 2: Convert to fraction form
    3,891.04/5,406.94 = 3,851.08/x
  3. Step 3: Cross multiply
    3,891.04x = 5,406.94 × 3,851.08
  4. Step 4: Simplify right side
    3,891.04x = 20,822,558.50
  5. Step 5: Solve for x
    x = 20,822,558.50/3,891.04
  6. Step 6: Final answer
    x = 5,351.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.