Home / 5,422.20-8,133.30-2,135.40

Finding the Fourth Proportional to 5,422.20, 8,133.30 and 2,135.40

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Solution

The fourth proportional to 5,422.20, 8,133.30 and 2,135.40 is: 3,203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.20 : 8,133.30 = 2,135.40 : x
  2. Step 2: Convert to fraction form
    5,422.20/8,133.30 = 2,135.40/x
  3. Step 3: Cross multiply
    5,422.20x = 8,133.30 × 2,135.40
  4. Step 4: Simplify right side
    5,422.20x = 17,367,848.82
  5. Step 5: Solve for x
    x = 17,367,848.82/5,422.20
  6. Step 6: Final answer
    x = 3,203.10

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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.