Home / 5,422.20-8,133.30-5,119.80

Finding the Fourth Proportional to 5,422.20, 8,133.30 and 5,119.80

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Solution

The fourth proportional to 5,422.20, 8,133.30 and 5,119.80 is: 7,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.20 : 8,133.30 = 5,119.80 : x
  2. Step 2: Convert to fraction form
    5,422.20/8,133.30 = 5,119.80/x
  3. Step 3: Cross multiply
    5,422.20x = 8,133.30 × 5,119.80
  4. Step 4: Simplify right side
    5,422.20x = 41,640,869.34
  5. Step 5: Solve for x
    x = 41,640,869.34/5,422.20
  6. Step 6: Final answer
    x = 7,679.70

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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.