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Finding the Fourth Proportional to 6,687.12, 10,040.12 and 4,213.92

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Solution

The fourth proportional to 6,687.12, 10,040.12 and 4,213.92 is: 6,326.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,687.12 : 10,040.12 = 4,213.92 : x
  2. Step 2: Convert to fraction form
    6,687.12/10,040.12 = 4,213.92/x
  3. Step 3: Cross multiply
    6,687.12x = 10,040.12 × 4,213.92
  4. Step 4: Simplify right side
    6,687.12x = 42,308,262.47
  5. Step 5: Solve for x
    x = 42,308,262.47/6,687.12
  6. Step 6: Final answer
    x = 6,326.83

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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.