Home / 6,821.20-10,215.60-4,196.80

Finding the Fourth Proportional to 6,821.20, 10,215.60 and 4,196.80

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Solution

The fourth proportional to 6,821.20, 10,215.60 and 4,196.80 is: 6,285.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,821.20 : 10,215.60 = 4,196.80 : x
  2. Step 2: Convert to fraction form
    6,821.20/10,215.60 = 4,196.80/x
  3. Step 3: Cross multiply
    6,821.20x = 10,215.60 × 4,196.80
  4. Step 4: Simplify right side
    6,821.20x = 42,872,830.08
  5. Step 5: Solve for x
    x = 42,872,830.08/6,821.20
  6. Step 6: Final answer
    x = 6,285.23

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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.