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Finding the Fourth Proportional to 6,720.44, 9,276.90 and 3,927.56

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Solution

The fourth proportional to 6,720.44, 9,276.90 and 3,927.56 is: 5,421.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,720.44 : 9,276.90 = 3,927.56 : x
  2. Step 2: Convert to fraction form
    6,720.44/9,276.90 = 3,927.56/x
  3. Step 3: Cross multiply
    6,720.44x = 9,276.90 × 3,927.56
  4. Step 4: Simplify right side
    6,720.44x = 36,435,581.36
  5. Step 5: Solve for x
    x = 36,435,581.36/6,720.44
  6. Step 6: Final answer
    x = 5,421.61

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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.