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Finding the Fourth Proportional to 7,990.85, 11,992.55 and 5,542.89

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Solution

The fourth proportional to 7,990.85, 11,992.55 and 5,542.89 is: 8,318.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.85 : 11,992.55 = 5,542.89 : x
  2. Step 2: Convert to fraction form
    7,990.85/11,992.55 = 5,542.89/x
  3. Step 3: Cross multiply
    7,990.85x = 11,992.55 × 5,542.89
  4. Step 4: Simplify right side
    7,990.85x = 66,473,357.76
  5. Step 5: Solve for x
    x = 66,473,357.76/7,990.85
  6. Step 6: Final answer
    x = 8,318.69

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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.