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Finding the Fourth Proportional to 6,451.56, 8,914.86 and 5,190.12

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Solution

The fourth proportional to 6,451.56, 8,914.86 and 5,190.12 is: 7,171.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,451.56 : 8,914.86 = 5,190.12 : x
  2. Step 2: Convert to fraction form
    6,451.56/8,914.86 = 5,190.12/x
  3. Step 3: Cross multiply
    6,451.56x = 8,914.86 × 5,190.12
  4. Step 4: Simplify right side
    6,451.56x = 46,269,193.18
  5. Step 5: Solve for x
    x = 46,269,193.18/6,451.56
  6. Step 6: Final answer
    x = 7,171.78

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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.