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Finding the Fourth Proportional to 7,980.69, 11,012.94 and 4,394.97

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Solution

The fourth proportional to 7,980.69, 11,012.94 and 4,394.97 is: 6,064.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.69 : 11,012.94 = 4,394.97 : x
  2. Step 2: Convert to fraction form
    7,980.69/11,012.94 = 4,394.97/x
  3. Step 3: Cross multiply
    7,980.69x = 11,012.94 × 4,394.97
  4. Step 4: Simplify right side
    7,980.69x = 48,401,540.91
  5. Step 5: Solve for x
    x = 48,401,540.91/7,980.69
  6. Step 6: Final answer
    x = 6,064.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.