Home / 5,211.45-7,191.75-2,821.42

Finding the Fourth Proportional to 5,211.45, 7,191.75 and 2,821.42

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Solution

The fourth proportional to 5,211.45, 7,191.75 and 2,821.42 is: 3,893.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.45 : 7,191.75 = 2,821.42 : x
  2. Step 2: Convert to fraction form
    5,211.45/7,191.75 = 2,821.42/x
  3. Step 3: Cross multiply
    5,211.45x = 7,191.75 × 2,821.42
  4. Step 4: Simplify right side
    5,211.45x = 20,290,966.86
  5. Step 5: Solve for x
    x = 20,290,966.86/5,211.45
  6. Step 6: Final answer
    x = 3,893.54

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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.