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Finding the Fourth Proportional to 7,248, 10,002.28 and 3,936

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Solution

The fourth proportional to 7,248, 10,002.28 and 3,936 is: 5,431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,248 : 10,002.28 = 3,936 : x
  2. Step 2: Convert to fraction form
    7,248/10,002.28 = 3,936/x
  3. Step 3: Cross multiply
    7,248x = 10,002.28 × 3,936
  4. Step 4: Simplify right side
    7,248x = 39,368,974.08
  5. Step 5: Solve for x
    x = 39,368,974.08/7,248
  6. Step 6: Final answer
    x = 5,431.70

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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.