Home / 7,428.28-11,142.42-3,047.80

Finding the Fourth Proportional to 7,428.28, 11,142.42 and 3,047.80

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Solution

The fourth proportional to 7,428.28, 11,142.42 and 3,047.80 is: 4,571.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.28 : 11,142.42 = 3,047.80 : x
  2. Step 2: Convert to fraction form
    7,428.28/11,142.42 = 3,047.80/x
  3. Step 3: Cross multiply
    7,428.28x = 11,142.42 × 3,047.80
  4. Step 4: Simplify right side
    7,428.28x = 33,959,867.68
  5. Step 5: Solve for x
    x = 33,959,867.68/7,428.28
  6. Step 6: Final answer
    x = 4,571.70

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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.