Home / 5,189.26-7,161.20-2,831.40

Finding the Fourth Proportional to 5,189.26, 7,161.20 and 2,831.40

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Solution

The fourth proportional to 5,189.26, 7,161.20 and 2,831.40 is: 3,907.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,189.26 : 7,161.20 = 2,831.40 : x
  2. Step 2: Convert to fraction form
    5,189.26/7,161.20 = 2,831.40/x
  3. Step 3: Cross multiply
    5,189.26x = 7,161.20 × 2,831.40
  4. Step 4: Simplify right side
    5,189.26x = 20,276,221.68
  5. Step 5: Solve for x
    x = 20,276,221.68/5,189.26
  6. Step 6: Final answer
    x = 3,907.34

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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.