Home / 5,211.38-7,191.67-2,821.36

Finding the Fourth Proportional to 5,211.38, 7,191.67 and 2,821.36

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Solution

The fourth proportional to 5,211.38, 7,191.67 and 2,821.36 is: 3,893.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.38 : 7,191.67 = 2,821.36 : x
  2. Step 2: Convert to fraction form
    5,211.38/7,191.67 = 2,821.36/x
  3. Step 3: Cross multiply
    5,211.38x = 7,191.67 × 2,821.36
  4. Step 4: Simplify right side
    5,211.38x = 20,290,275.96
  5. Step 5: Solve for x
    x = 20,290,275.96/5,211.38
  6. Step 6: Final answer
    x = 3,893.46

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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.