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Finding the Fourth Proportional to 7,691.06, 11,536.91 and 3,990.91

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Solution

The fourth proportional to 7,691.06, 11,536.91 and 3,990.91 is: 5,986.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,691.06 : 11,536.91 = 3,990.91 : x
  2. Step 2: Convert to fraction form
    7,691.06/11,536.91 = 3,990.91/x
  3. Step 3: Cross multiply
    7,691.06x = 11,536.91 × 3,990.91
  4. Step 4: Simplify right side
    7,691.06x = 46,042,769.49
  5. Step 5: Solve for x
    x = 46,042,769.49/7,691.06
  6. Step 6: Final answer
    x = 5,986.53

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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.