Home / 3,896.88-5,377.71-2,128.47

Finding the Fourth Proportional to 3,896.88, 5,377.71 and 2,128.47

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Solution

The fourth proportional to 3,896.88, 5,377.71 and 2,128.47 is: 2,937.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,896.88 : 5,377.71 = 2,128.47 : x
  2. Step 2: Convert to fraction form
    3,896.88/5,377.71 = 2,128.47/x
  3. Step 3: Cross multiply
    3,896.88x = 5,377.71 × 2,128.47
  4. Step 4: Simplify right side
    3,896.88x = 11,446,294.40
  5. Step 5: Solve for x
    x = 11,446,294.40/3,896.88
  6. Step 6: Final answer
    x = 2,937.30

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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.