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Finding the Fourth Proportional to 5,674.70, 7,831.39 and 3,318.22

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Solution

The fourth proportional to 5,674.70, 7,831.39 and 3,318.22 is: 4,579.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,674.70 : 7,831.39 = 3,318.22 : x
  2. Step 2: Convert to fraction form
    5,674.70/7,831.39 = 3,318.22/x
  3. Step 3: Cross multiply
    5,674.70x = 7,831.39 × 3,318.22
  4. Step 4: Simplify right side
    5,674.70x = 25,986,274.93
  5. Step 5: Solve for x
    x = 25,986,274.93/5,674.70
  6. Step 6: Final answer
    x = 4,579.32

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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.