Home / 3,900.07-5,383.04-2,221.89

Finding the Fourth Proportional to 3,900.07, 5,383.04 and 2,221.89

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Solution

The fourth proportional to 3,900.07, 5,383.04 and 2,221.89 is: 3,066.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.07 : 5,383.04 = 2,221.89 : x
  2. Step 2: Convert to fraction form
    3,900.07/5,383.04 = 2,221.89/x
  3. Step 3: Cross multiply
    3,900.07x = 5,383.04 × 2,221.89
  4. Step 4: Simplify right side
    3,900.07x = 11,960,537.11
  5. Step 5: Solve for x
    x = 11,960,537.11/3,900.07
  6. Step 6: Final answer
    x = 3,066.75

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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.