Home / 3,891.83-5,370.67-2,123.40

Finding the Fourth Proportional to 3,891.83, 5,370.67 and 2,123.40

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Solution

The fourth proportional to 3,891.83, 5,370.67 and 2,123.40 is: 2,930.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.83 : 5,370.67 = 2,123.40 : x
  2. Step 2: Convert to fraction form
    3,891.83/5,370.67 = 2,123.40/x
  3. Step 3: Cross multiply
    3,891.83x = 5,370.67 × 2,123.40
  4. Step 4: Simplify right side
    3,891.83x = 11,404,080.68
  5. Step 5: Solve for x
    x = 11,404,080.68/3,891.83
  6. Step 6: Final answer
    x = 2,930.26

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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.