Home / 3,891.39-5,370.33-2,123.02

Finding the Fourth Proportional to 3,891.39, 5,370.33 and 2,123.02

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Solution

The fourth proportional to 3,891.39, 5,370.33 and 2,123.02 is: 2,929.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.39 : 5,370.33 = 2,123.02 : x
  2. Step 2: Convert to fraction form
    3,891.39/5,370.33 = 2,123.02/x
  3. Step 3: Cross multiply
    3,891.39x = 5,370.33 × 2,123.02
  4. Step 4: Simplify right side
    3,891.39x = 11,401,318.00
  5. Step 5: Solve for x
    x = 11,401,318.00/3,891.39
  6. Step 6: Final answer
    x = 2,929.88

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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.