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Finding the Fourth Proportional to 6,813.76, 9,402.84 and 3,788.68

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Solution

The fourth proportional to 6,813.76, 9,402.84 and 3,788.68 is: 5,228.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,813.76 : 9,402.84 = 3,788.68 : x
  2. Step 2: Convert to fraction form
    6,813.76/9,402.84 = 3,788.68/x
  3. Step 3: Cross multiply
    6,813.76x = 9,402.84 × 3,788.68
  4. Step 4: Simplify right side
    6,813.76x = 35,624,351.85
  5. Step 5: Solve for x
    x = 35,624,351.85/6,813.76
  6. Step 6: Final answer
    x = 5,228.30

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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.