Home / 3,213.60-4,820.40-3,148.80

Finding the Fourth Proportional to 3,213.60, 4,820.40 and 3,148.80

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Solution

The fourth proportional to 3,213.60, 4,820.40 and 3,148.80 is: 4,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.60 : 4,820.40 = 3,148.80 : x
  2. Step 2: Convert to fraction form
    3,213.60/4,820.40 = 3,148.80/x
  3. Step 3: Cross multiply
    3,213.60x = 4,820.40 × 3,148.80
  4. Step 4: Simplify right side
    3,213.60x = 15,178,475.52
  5. Step 5: Solve for x
    x = 15,178,475.52/3,213.60
  6. Step 6: Final answer
    x = 4,723.20

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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.