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Finding the Fourth Proportional to 5,172, 7,757.07 and 2,212.11

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Solution

The fourth proportional to 5,172, 7,757.07 and 2,212.11 is: 3,317.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172 : 7,757.07 = 2,212.11 : x
  2. Step 2: Convert to fraction form
    5,172/7,757.07 = 2,212.11/x
  3. Step 3: Cross multiply
    5,172x = 7,757.07 × 2,212.11
  4. Step 4: Simplify right side
    5,172x = 17,159,454.73
  5. Step 5: Solve for x
    x = 17,159,454.73/5,172
  6. Step 6: Final answer
    x = 3,317.76

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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.