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Finding the Fourth Proportional to 6,274.40, 8,664.18 and 3,920.56

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Solution

The fourth proportional to 6,274.40, 8,664.18 and 3,920.56 is: 5,413.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,274.40 : 8,664.18 = 3,920.56 : x
  2. Step 2: Convert to fraction form
    6,274.40/8,664.18 = 3,920.56/x
  3. Step 3: Cross multiply
    6,274.40x = 8,664.18 × 3,920.56
  4. Step 4: Simplify right side
    6,274.40x = 33,968,437.54
  5. Step 5: Solve for x
    x = 33,968,437.54/6,274.40
  6. Step 6: Final answer
    x = 5,413.81

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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.