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Finding the Fourth Proportional to 9,326.79, 13,990.20 and 7,679.88

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Solution

The fourth proportional to 9,326.79, 13,990.20 and 7,679.88 is: 11,519.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,326.79 : 13,990.20 = 7,679.88 : x
  2. Step 2: Convert to fraction form
    9,326.79/13,990.20 = 7,679.88/x
  3. Step 3: Cross multiply
    9,326.79x = 13,990.20 × 7,679.88
  4. Step 4: Simplify right side
    9,326.79x = 107,442,987.23
  5. Step 5: Solve for x
    x = 107,442,987.23/9,326.79
  6. Step 6: Final answer
    x = 11,519.83

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Similar ratio
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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.