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Finding the Fourth Proportional to 7,182.91, 9,912.42 and 4,039.12

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Solution

The fourth proportional to 7,182.91, 9,912.42 and 4,039.12 is: 5,573.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,182.91 : 9,912.42 = 4,039.12 : x
  2. Step 2: Convert to fraction form
    7,182.91/9,912.42 = 4,039.12/x
  3. Step 3: Cross multiply
    7,182.91x = 9,912.42 × 4,039.12
  4. Step 4: Simplify right side
    7,182.91x = 40,037,453.87
  5. Step 5: Solve for x
    x = 40,037,453.87/7,182.91
  6. Step 6: Final answer
    x = 5,573.99

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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.