Home / 20,271.20-30,408.72-8,422.48

Finding the Fourth Proportional to 20,271.20, 30,408.72 and 8,422.48

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Solution

The fourth proportional to 20,271.20, 30,408.72 and 8,422.48 is: 12,634.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.20 : 30,408.72 = 8,422.48 : x
  2. Step 2: Convert to fraction form
    20,271.20/30,408.72 = 8,422.48/x
  3. Step 3: Cross multiply
    20,271.20x = 30,408.72 × 8,422.48
  4. Step 4: Simplify right side
    20,271.20x = 256,116,836.03
  5. Step 5: Solve for x
    x = 256,116,836.03/20,271.20
  6. Step 6: Final answer
    x = 12,634.52

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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.