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Finding the Fourth Proportional to 5,376, 7,418.88 and 3,168

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Solution

The fourth proportional to 5,376, 7,418.88 and 3,168 is: 4,371.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,376 : 7,418.88 = 3,168 : x
  2. Step 2: Convert to fraction form
    5,376/7,418.88 = 3,168/x
  3. Step 3: Cross multiply
    5,376x = 7,418.88 × 3,168
  4. Step 4: Simplify right side
    5,376x = 23,503,011.84
  5. Step 5: Solve for x
    x = 23,503,011.84/5,376
  6. Step 6: Final answer
    x = 4,371.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.