Home / 3,911.41-5,397.71-2,118.89

Finding the Fourth Proportional to 3,911.41, 5,397.71 and 2,118.89

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Solution

The fourth proportional to 3,911.41, 5,397.71 and 2,118.89 is: 2,924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.41 : 5,397.71 = 2,118.89 : x
  2. Step 2: Convert to fraction form
    3,911.41/5,397.71 = 2,118.89/x
  3. Step 3: Cross multiply
    3,911.41x = 5,397.71 × 2,118.89
  4. Step 4: Simplify right side
    3,911.41x = 11,437,153.74
  5. Step 5: Solve for x
    x = 11,437,153.74/3,911.41
  6. Step 6: Final answer
    x = 2,924.05

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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.