Home / 3,897.11-5,377.95-2,128.74

Finding the Fourth Proportional to 3,897.11, 5,377.95 and 2,128.74

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Solution

The fourth proportional to 3,897.11, 5,377.95 and 2,128.74 is: 2,937.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.11 : 5,377.95 = 2,128.74 : x
  2. Step 2: Convert to fraction form
    3,897.11/5,377.95 = 2,128.74/x
  3. Step 3: Cross multiply
    3,897.11x = 5,377.95 × 2,128.74
  4. Step 4: Simplify right side
    3,897.11x = 11,448,257.28
  5. Step 5: Solve for x
    x = 11,448,257.28/3,897.11
  6. Step 6: Final answer
    x = 2,937.63

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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.