Home / 3,012.40-4,518.60-2,180.80

Finding the Fourth Proportional to 3,012.40, 4,518.60 and 2,180.80

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Solution

The fourth proportional to 3,012.40, 4,518.60 and 2,180.80 is: 3,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.40 : 4,518.60 = 2,180.80 : x
  2. Step 2: Convert to fraction form
    3,012.40/4,518.60 = 2,180.80/x
  3. Step 3: Cross multiply
    3,012.40x = 4,518.60 × 2,180.80
  4. Step 4: Simplify right side
    3,012.40x = 9,854,162.88
  5. Step 5: Solve for x
    x = 9,854,162.88/3,012.40
  6. Step 6: Final answer
    x = 3,271.20

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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.