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Finding the Fourth Proportional to 7,690.50, 11,537.67 and 2,218.50

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Solution

The fourth proportional to 7,690.50, 11,537.67 and 2,218.50 is: 3,328.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,690.50 : 11,537.67 = 2,218.50 : x
  2. Step 2: Convert to fraction form
    7,690.50/11,537.67 = 2,218.50/x
  3. Step 3: Cross multiply
    7,690.50x = 11,537.67 × 2,218.50
  4. Step 4: Simplify right side
    7,690.50x = 25,596,320.90
  5. Step 5: Solve for x
    x = 25,596,320.90/7,690.50
  6. Step 6: Final answer
    x = 3,328.30

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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.