Home / 3,938.70-5,440.17-2,948.28

Finding the Fourth Proportional to 3,938.70, 5,440.17 and 2,948.28

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Solution

The fourth proportional to 3,938.70, 5,440.17 and 2,948.28 is: 4,072.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.70 : 5,440.17 = 2,948.28 : x
  2. Step 2: Convert to fraction form
    3,938.70/5,440.17 = 2,948.28/x
  3. Step 3: Cross multiply
    3,938.70x = 5,440.17 × 2,948.28
  4. Step 4: Simplify right side
    3,938.70x = 16,039,144.41
  5. Step 5: Solve for x
    x = 16,039,144.41/3,938.70
  6. Step 6: Final answer
    x = 4,072.19

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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.