Home / 5,189.70-7,161.81-2,831.90

Finding the Fourth Proportional to 5,189.70, 7,161.81 and 2,831.90

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Solution

The fourth proportional to 5,189.70, 7,161.81 and 2,831.90 is: 3,908.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,189.70 : 7,161.81 = 2,831.90 : x
  2. Step 2: Convert to fraction form
    5,189.70/7,161.81 = 2,831.90/x
  3. Step 3: Cross multiply
    5,189.70x = 7,161.81 × 2,831.90
  4. Step 4: Simplify right side
    5,189.70x = 20,281,493.93
  5. Step 5: Solve for x
    x = 20,281,493.93/5,189.70
  6. Step 6: Final answer
    x = 3,908.03

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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.