Home / 3,878.19-5,807.99-2,120.55

Finding the Fourth Proportional to 3,878.19, 5,807.99 and 2,120.55

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Solution

The fourth proportional to 3,878.19, 5,807.99 and 2,120.55 is: 3,175.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.19 : 5,807.99 = 2,120.55 : x
  2. Step 2: Convert to fraction form
    3,878.19/5,807.99 = 2,120.55/x
  3. Step 3: Cross multiply
    3,878.19x = 5,807.99 × 2,120.55
  4. Step 4: Simplify right side
    3,878.19x = 12,316,133.19
  5. Step 5: Solve for x
    x = 12,316,133.19/3,878.19
  6. Step 6: Final answer
    x = 3,175.74

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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.