Home / 3,909.85-5,395.57-2,141.49

Finding the Fourth Proportional to 3,909.85, 5,395.57 and 2,141.49

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Solution

The fourth proportional to 3,909.85, 5,395.57 and 2,141.49 is: 2,955.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.85 : 5,395.57 = 2,141.49 : x
  2. Step 2: Convert to fraction form
    3,909.85/5,395.57 = 2,141.49/x
  3. Step 3: Cross multiply
    3,909.85x = 5,395.57 × 2,141.49
  4. Step 4: Simplify right side
    3,909.85x = 11,554,559.20
  5. Step 5: Solve for x
    x = 11,554,559.20/3,909.85
  6. Step 6: Final answer
    x = 2,955.24

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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.