Home / 5,211.57-7,191.92-2,821.50

Finding the Fourth Proportional to 5,211.57, 7,191.92 and 2,821.50

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Solution

The fourth proportional to 5,211.57, 7,191.92 and 2,821.50 is: 3,893.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.57 : 7,191.92 = 2,821.50 : x
  2. Step 2: Convert to fraction form
    5,211.57/7,191.92 = 2,821.50/x
  3. Step 3: Cross multiply
    5,211.57x = 7,191.92 × 2,821.50
  4. Step 4: Simplify right side
    5,211.57x = 20,291,988.17
  5. Step 5: Solve for x
    x = 20,291,988.17/5,211.57
  6. Step 6: Final answer
    x = 3,893.64

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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.