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Finding the Fourth Proportional to 6,839.76, 9,438.76 and 3,855.60

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Solution

The fourth proportional to 6,839.76, 9,438.76 and 3,855.60 is: 5,320.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,839.76 : 9,438.76 = 3,855.60 : x
  2. Step 2: Convert to fraction form
    6,839.76/9,438.76 = 3,855.60/x
  3. Step 3: Cross multiply
    6,839.76x = 9,438.76 × 3,855.60
  4. Step 4: Simplify right side
    6,839.76x = 36,392,083.06
  5. Step 5: Solve for x
    x = 36,392,083.06/6,839.76
  6. Step 6: Final answer
    x = 5,320.67

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1.5x scale

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.