Home / 55,255.20-82,915.20-20,198.40

Finding the Fourth Proportional to 55,255.20, 82,915.20 and 20,198.40

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Solution

The fourth proportional to 55,255.20, 82,915.20 and 20,198.40 is: 30,309.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,255.20 : 82,915.20 = 20,198.40 : x
  2. Step 2: Convert to fraction form
    55,255.20/82,915.20 = 20,198.40/x
  3. Step 3: Cross multiply
    55,255.20x = 82,915.20 × 20,198.40
  4. Step 4: Simplify right side
    55,255.20x = 1,674,754,375.68
  5. Step 5: Solve for x
    x = 1,674,754,375.68/55,255.20
  6. Step 6: Final answer
    x = 30,309.44

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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.