Home / 3,879.47-5,353.70-2,111.07

Finding the Fourth Proportional to 3,879.47, 5,353.70 and 2,111.07

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Solution

The fourth proportional to 3,879.47, 5,353.70 and 2,111.07 is: 2,913.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.47 : 5,353.70 = 2,111.07 : x
  2. Step 2: Convert to fraction form
    3,879.47/5,353.70 = 2,111.07/x
  3. Step 3: Cross multiply
    3,879.47x = 5,353.70 × 2,111.07
  4. Step 4: Simplify right side
    3,879.47x = 11,302,008.69
  5. Step 5: Solve for x
    x = 11,302,008.69/3,879.47
  6. Step 6: Final answer
    x = 2,913.29

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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.