Home / 8,142.20-12,213.30-4,205.60

Finding the Fourth Proportional to 8,142.20, 12,213.30 and 4,205.60

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Solution

The fourth proportional to 8,142.20, 12,213.30 and 4,205.60 is: 6,308.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,142.20 : 12,213.30 = 4,205.60 : x
  2. Step 2: Convert to fraction form
    8,142.20/12,213.30 = 4,205.60/x
  3. Step 3: Cross multiply
    8,142.20x = 12,213.30 × 4,205.60
  4. Step 4: Simplify right side
    8,142.20x = 51,364,254.48
  5. Step 5: Solve for x
    x = 51,364,254.48/8,142.20
  6. Step 6: Final answer
    x = 6,308.40

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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.