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Finding the Fourth Proportional to 6,990.67, 10,485.95 and 2,830.61

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Solution

The fourth proportional to 6,990.67, 10,485.95 and 2,830.61 is: 4,245.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.67 : 10,485.95 = 2,830.61 : x
  2. Step 2: Convert to fraction form
    6,990.67/10,485.95 = 2,830.61/x
  3. Step 3: Cross multiply
    6,990.67x = 10,485.95 × 2,830.61
  4. Step 4: Simplify right side
    6,990.67x = 29,681,675.41
  5. Step 5: Solve for x
    x = 29,681,675.41/6,990.67
  6. Step 6: Final answer
    x = 4,245.90

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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.