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Finding the Fourth Proportional to 5,223.80, 7,821.30 and 4,071.80

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Solution

The fourth proportional to 5,223.80, 7,821.30 and 4,071.80 is: 6,096.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,223.80 : 7,821.30 = 4,071.80 : x
  2. Step 2: Convert to fraction form
    5,223.80/7,821.30 = 4,071.80/x
  3. Step 3: Cross multiply
    5,223.80x = 7,821.30 × 4,071.80
  4. Step 4: Simplify right side
    5,223.80x = 31,846,769.34
  5. Step 5: Solve for x
    x = 31,846,769.34/5,223.80
  6. Step 6: Final answer
    x = 6,096.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.