Home / 2,928.13-4,038.78-2,831.71

Finding the Fourth Proportional to 2,928.13, 4,038.78 and 2,831.71

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Solution

The fourth proportional to 2,928.13, 4,038.78 and 2,831.71 is: 3,905.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.13 : 4,038.78 = 2,831.71 : x
  2. Step 2: Convert to fraction form
    2,928.13/4,038.78 = 2,831.71/x
  3. Step 3: Cross multiply
    2,928.13x = 4,038.78 × 2,831.71
  4. Step 4: Simplify right side
    2,928.13x = 11,436,653.71
  5. Step 5: Solve for x
    x = 11,436,653.71/2,928.13
  6. Step 6: Final answer
    x = 3,905.79

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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.