Home / 5,189.71-7,161.69-2,831.80

Finding the Fourth Proportional to 5,189.71, 7,161.69 and 2,831.80

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Solution

The fourth proportional to 5,189.71, 7,161.69 and 2,831.80 is: 3,907.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,189.71 : 7,161.69 = 2,831.80 : x
  2. Step 2: Convert to fraction form
    5,189.71/7,161.69 = 2,831.80/x
  3. Step 3: Cross multiply
    5,189.71x = 7,161.69 × 2,831.80
  4. Step 4: Simplify right side
    5,189.71x = 20,280,473.74
  5. Step 5: Solve for x
    x = 20,280,473.74/5,189.71
  6. Step 6: Final answer
    x = 3,907.82

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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.