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Finding the Fourth Proportional to 6,809.76, 10,215.20 and 2,914.20

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Solution

The fourth proportional to 6,809.76, 10,215.20 and 2,914.20 is: 4,371.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,809.76 : 10,215.20 = 2,914.20 : x
  2. Step 2: Convert to fraction form
    6,809.76/10,215.20 = 2,914.20/x
  3. Step 3: Cross multiply
    6,809.76x = 10,215.20 × 2,914.20
  4. Step 4: Simplify right side
    6,809.76x = 29,769,135.84
  5. Step 5: Solve for x
    x = 29,769,135.84/6,809.76
  6. Step 6: Final answer
    x = 4,371.54

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1.5x scale

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.