Home / 5,422.80-8,134.20-2,825.40

Finding the Fourth Proportional to 5,422.80, 8,134.20 and 2,825.40

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Solution

The fourth proportional to 5,422.80, 8,134.20 and 2,825.40 is: 4,238.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.80 : 8,134.20 = 2,825.40 : x
  2. Step 2: Convert to fraction form
    5,422.80/8,134.20 = 2,825.40/x
  3. Step 3: Cross multiply
    5,422.80x = 8,134.20 × 2,825.40
  4. Step 4: Simplify right side
    5,422.80x = 22,982,368.68
  5. Step 5: Solve for x
    x = 22,982,368.68/5,422.80
  6. Step 6: Final answer
    x = 4,238.10

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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.