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Finding the Fourth Proportional to 6,517.81, 8,989.81 and 4,278.87

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Solution

The fourth proportional to 6,517.81, 8,989.81 and 4,278.87 is: 5,901.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,517.81 : 8,989.81 = 4,278.87 : x
  2. Step 2: Convert to fraction form
    6,517.81/8,989.81 = 4,278.87/x
  3. Step 3: Cross multiply
    6,517.81x = 8,989.81 × 4,278.87
  4. Step 4: Simplify right side
    6,517.81x = 38,466,229.39
  5. Step 5: Solve for x
    x = 38,466,229.39/6,517.81
  6. Step 6: Final answer
    x = 5,901.71

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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.