Home / 3,868.09-5,337.87-2,189.42

Finding the Fourth Proportional to 3,868.09, 5,337.87 and 2,189.42

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Solution

The fourth proportional to 3,868.09, 5,337.87 and 2,189.42 is: 3,021.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.09 : 5,337.87 = 2,189.42 : x
  2. Step 2: Convert to fraction form
    3,868.09/5,337.87 = 2,189.42/x
  3. Step 3: Cross multiply
    3,868.09x = 5,337.87 × 2,189.42
  4. Step 4: Simplify right side
    3,868.09x = 11,686,839.34
  5. Step 5: Solve for x
    x = 11,686,839.34/3,868.09
  6. Step 6: Final answer
    x = 3,021.35

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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.