Home / 5,189.80-7,161.96-2,831.98

Finding the Fourth Proportional to 5,189.80, 7,161.96 and 2,831.98

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Solution

The fourth proportional to 5,189.80, 7,161.96 and 2,831.98 is: 3,908.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,189.80 : 7,161.96 = 2,831.98 : x
  2. Step 2: Convert to fraction form
    5,189.80/7,161.96 = 2,831.98/x
  3. Step 3: Cross multiply
    5,189.80x = 7,161.96 × 2,831.98
  4. Step 4: Simplify right side
    5,189.80x = 20,282,491.67
  5. Step 5: Solve for x
    x = 20,282,491.67/5,189.80
  6. Step 6: Final answer
    x = 3,908.15

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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.