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Finding the Fourth Proportional to 4,089, 6,121.53 and 3,699.90

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Solution

The fourth proportional to 4,089, 6,121.53 and 3,699.90 is: 5,539.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,089 : 6,121.53 = 3,699.90 : x
  2. Step 2: Convert to fraction form
    4,089/6,121.53 = 3,699.90/x
  3. Step 3: Cross multiply
    4,089x = 6,121.53 × 3,699.90
  4. Step 4: Simplify right side
    4,089x = 22,649,048.85
  5. Step 5: Solve for x
    x = 22,649,048.85/4,089
  6. Step 6: Final answer
    x = 5,539.02

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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.