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Finding the Fourth Proportional to 5,211.66, 7,192.10 and 2,821.66

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Solution

The fourth proportional to 5,211.66, 7,192.10 and 2,821.66 is: 3,893.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.66 : 7,192.10 = 2,821.66 : x
  2. Step 2: Convert to fraction form
    5,211.66/7,192.10 = 2,821.66/x
  3. Step 3: Cross multiply
    5,211.66x = 7,192.10 × 2,821.66
  4. Step 4: Simplify right side
    5,211.66x = 20,293,668.74
  5. Step 5: Solve for x
    x = 20,293,668.74/5,211.66
  6. Step 6: Final answer
    x = 3,893.90

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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.