Home / 3,991.70-5,509.08-2,876.33

Finding the Fourth Proportional to 3,991.70, 5,509.08 and 2,876.33

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Solution

The fourth proportional to 3,991.70, 5,509.08 and 2,876.33 is: 3,969.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.70 : 5,509.08 = 2,876.33 : x
  2. Step 2: Convert to fraction form
    3,991.70/5,509.08 = 2,876.33/x
  3. Step 3: Cross multiply
    3,991.70x = 5,509.08 × 2,876.33
  4. Step 4: Simplify right side
    3,991.70x = 15,845,932.08
  5. Step 5: Solve for x
    x = 15,845,932.08/3,991.70
  6. Step 6: Final answer
    x = 3,969.72

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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.