Home / 3,970.10-5,479.74-2,791.58

Finding the Fourth Proportional to 3,970.10, 5,479.74 and 2,791.58

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Solution

The fourth proportional to 3,970.10, 5,479.74 and 2,791.58 is: 3,853.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.10 : 5,479.74 = 2,791.58 : x
  2. Step 2: Convert to fraction form
    3,970.10/5,479.74 = 2,791.58/x
  3. Step 3: Cross multiply
    3,970.10x = 5,479.74 × 2,791.58
  4. Step 4: Simplify right side
    3,970.10x = 15,297,132.59
  5. Step 5: Solve for x
    x = 15,297,132.59/3,970.10
  6. Step 6: Final answer
    x = 3,853.08

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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.