Home / 5,382.80-7,428.02-3,144.88

Finding the Fourth Proportional to 5,382.80, 7,428.02 and 3,144.88

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Solution

The fourth proportional to 5,382.80, 7,428.02 and 3,144.88 is: 4,339.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,382.80 : 7,428.02 = 3,144.88 : x
  2. Step 2: Convert to fraction form
    5,382.80/7,428.02 = 3,144.88/x
  3. Step 3: Cross multiply
    5,382.80x = 7,428.02 × 3,144.88
  4. Step 4: Simplify right side
    5,382.80x = 23,360,231.54
  5. Step 5: Solve for x
    x = 23,360,231.54/5,382.80
  6. Step 6: Final answer
    x = 4,339.79

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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.