Home / 3,891.74-5,370.30-2,123.28

Finding the Fourth Proportional to 3,891.74, 5,370.30 and 2,123.28

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Solution

The fourth proportional to 3,891.74, 5,370.30 and 2,123.28 is: 2,929.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.74 : 5,370.30 = 2,123.28 : x
  2. Step 2: Convert to fraction form
    3,891.74/5,370.30 = 2,123.28/x
  3. Step 3: Cross multiply
    3,891.74x = 5,370.30 × 2,123.28
  4. Step 4: Simplify right side
    3,891.74x = 11,402,650.58
  5. Step 5: Solve for x
    x = 11,402,650.58/3,891.74
  6. Step 6: Final answer
    x = 2,929.97

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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.