Home / 3,909.91-5,395.78-2,141.63

Finding the Fourth Proportional to 3,909.91, 5,395.78 and 2,141.63

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Solution

The fourth proportional to 3,909.91, 5,395.78 and 2,141.63 is: 2,955.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.91 : 5,395.78 = 2,141.63 : x
  2. Step 2: Convert to fraction form
    3,909.91/5,395.78 = 2,141.63/x
  3. Step 3: Cross multiply
    3,909.91x = 5,395.78 × 2,141.63
  4. Step 4: Simplify right side
    3,909.91x = 11,555,764.32
  5. Step 5: Solve for x
    x = 11,555,764.32/3,909.91
  6. Step 6: Final answer
    x = 2,955.51

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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.