Home / 3,211.20-4,428.27-2,187.36

Finding the Fourth Proportional to 3,211.20, 4,428.27 and 2,187.36

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Solution

The fourth proportional to 3,211.20, 4,428.27 and 2,187.36 is: 3,016.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.20 : 4,428.27 = 2,187.36 : x
  2. Step 2: Convert to fraction form
    3,211.20/4,428.27 = 2,187.36/x
  3. Step 3: Cross multiply
    3,211.20x = 4,428.27 × 2,187.36
  4. Step 4: Simplify right side
    3,211.20x = 9,686,220.67
  5. Step 5: Solve for x
    x = 9,686,220.67/3,211.20
  6. Step 6: Final answer
    x = 3,016.39

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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.