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Finding the Fourth Proportional to 8,635.75, 12,931.74 and 5,338.84

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Solution

The fourth proportional to 8,635.75, 12,931.74 and 5,338.84 is: 7,994.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,635.75 : 12,931.74 = 5,338.84 : x
  2. Step 2: Convert to fraction form
    8,635.75/12,931.74 = 5,338.84/x
  3. Step 3: Cross multiply
    8,635.75x = 12,931.74 × 5,338.84
  4. Step 4: Simplify right side
    8,635.75x = 69,040,490.78
  5. Step 5: Solve for x
    x = 69,040,490.78/8,635.75
  6. Step 6: Final answer
    x = 7,994.73

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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.