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Finding the Fourth Proportional to 6,438.94, 8,885.43 and 3,954.46

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Solution

The fourth proportional to 6,438.94, 8,885.43 and 3,954.46 is: 5,456.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.94 : 8,885.43 = 3,954.46 : x
  2. Step 2: Convert to fraction form
    6,438.94/8,885.43 = 3,954.46/x
  3. Step 3: Cross multiply
    6,438.94x = 8,885.43 × 3,954.46
  4. Step 4: Simplify right side
    6,438.94x = 35,137,077.52
  5. Step 5: Solve for x
    x = 35,137,077.52/6,438.94
  6. Step 6: Final answer
    x = 5,456.97

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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.