Home / 3,913.76-5,400.98-2,121.29

Finding the Fourth Proportional to 3,913.76, 5,400.98 and 2,121.29

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Solution

The fourth proportional to 3,913.76, 5,400.98 and 2,121.29 is: 2,927.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.76 : 5,400.98 = 2,121.29 : x
  2. Step 2: Convert to fraction form
    3,913.76/5,400.98 = 2,121.29/x
  3. Step 3: Cross multiply
    3,913.76x = 5,400.98 × 2,121.29
  4. Step 4: Simplify right side
    3,913.76x = 11,457,007.25
  5. Step 5: Solve for x
    x = 11,457,007.25/3,913.76
  6. Step 6: Final answer
    x = 2,927.36

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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.