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Finding the Fourth Proportional to 6,442.63, 8,891.55 and 3,926.21

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Solution

The fourth proportional to 6,442.63, 8,891.55 and 3,926.21 is: 5,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,442.63 : 8,891.55 = 3,926.21 : x
  2. Step 2: Convert to fraction form
    6,442.63/8,891.55 = 3,926.21/x
  3. Step 3: Cross multiply
    6,442.63x = 8,891.55 × 3,926.21
  4. Step 4: Simplify right side
    6,442.63x = 34,910,048.07
  5. Step 5: Solve for x
    x = 34,910,048.07/6,442.63
  6. Step 6: Final answer
    x = 5,418.60

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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.