Home / 3,970.81-5,948.47-2,121.28

Finding the Fourth Proportional to 3,970.81, 5,948.47 and 2,121.28

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Solution

The fourth proportional to 3,970.81, 5,948.47 and 2,121.28 is: 3,177.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.81 : 5,948.47 = 2,121.28 : x
  2. Step 2: Convert to fraction form
    3,970.81/5,948.47 = 2,121.28/x
  3. Step 3: Cross multiply
    3,970.81x = 5,948.47 × 2,121.28
  4. Step 4: Simplify right side
    3,970.81x = 12,618,370.44
  5. Step 5: Solve for x
    x = 12,618,370.44/3,970.81
  6. Step 6: Final answer
    x = 3,177.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.