Home / 3,686.41-5,521.31-2,122.71

Finding the Fourth Proportional to 3,686.41, 5,521.31 and 2,122.71

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Solution

The fourth proportional to 3,686.41, 5,521.31 and 2,122.71 is: 3,179.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,686.41 : 5,521.31 = 2,122.71 : x
  2. Step 2: Convert to fraction form
    3,686.41/5,521.31 = 2,122.71/x
  3. Step 3: Cross multiply
    3,686.41x = 5,521.31 × 2,122.71
  4. Step 4: Simplify right side
    3,686.41x = 11,720,128.53
  5. Step 5: Solve for x
    x = 11,720,128.53/3,686.41
  6. Step 6: Final answer
    x = 3,179.28

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1.5x scale

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.