Home / 5,188.78-7,160.49-2,831.02

Finding the Fourth Proportional to 5,188.78, 7,160.49 and 2,831.02

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Solution

The fourth proportional to 5,188.78, 7,160.49 and 2,831.02 is: 3,906.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,188.78 : 7,160.49 = 2,831.02 : x
  2. Step 2: Convert to fraction form
    5,188.78/7,160.49 = 2,831.02/x
  3. Step 3: Cross multiply
    5,188.78x = 7,160.49 × 2,831.02
  4. Step 4: Simplify right side
    5,188.78x = 20,271,490.40
  5. Step 5: Solve for x
    x = 20,271,490.40/5,188.78
  6. Step 6: Final answer
    x = 3,906.79

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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.