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Finding the Fourth Proportional to 5,115.99, 7,667.10 and 2,645.64

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Solution

The fourth proportional to 5,115.99, 7,667.10 and 2,645.64 is: 3,964.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.99 : 7,667.10 = 2,645.64 : x
  2. Step 2: Convert to fraction form
    5,115.99/7,667.10 = 2,645.64/x
  3. Step 3: Cross multiply
    5,115.99x = 7,667.10 × 2,645.64
  4. Step 4: Simplify right side
    5,115.99x = 20,284,386.44
  5. Step 5: Solve for x
    x = 20,284,386.44/5,115.99
  6. Step 6: Final answer
    x = 3,964.90

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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.