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Finding the Fourth Proportional to 7,221.31, 10,831.97 and 2,604.31

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Solution

The fourth proportional to 7,221.31, 10,831.97 and 2,604.31 is: 3,906.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.31 : 10,831.97 = 2,604.31 : x
  2. Step 2: Convert to fraction form
    7,221.31/10,831.97 = 2,604.31/x
  3. Step 3: Cross multiply
    7,221.31x = 10,831.97 × 2,604.31
  4. Step 4: Simplify right side
    7,221.31x = 28,209,834.87
  5. Step 5: Solve for x
    x = 28,209,834.87/7,221.31
  6. Step 6: Final answer
    x = 3,906.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.