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Finding the Fourth Proportional to 5,487.90, 8,211.60 and 4,029.90

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Solution

The fourth proportional to 5,487.90, 8,211.60 and 4,029.90 is: 6,029.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.90 : 8,211.60 = 4,029.90 : x
  2. Step 2: Convert to fraction form
    5,487.90/8,211.60 = 4,029.90/x
  3. Step 3: Cross multiply
    5,487.90x = 8,211.60 × 4,029.90
  4. Step 4: Simplify right side
    5,487.90x = 33,091,926.84
  5. Step 5: Solve for x
    x = 33,091,926.84/5,487.90
  6. Step 6: Final answer
    x = 6,029.98

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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.