Home / 11,989.47-16,540.59-7,958.19

Finding the Fourth Proportional to 11,989.47, 16,540.59 and 7,958.19

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Solution

The fourth proportional to 11,989.47, 16,540.59 and 7,958.19 is: 10,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,989.47 : 16,540.59 = 7,958.19 : x
  2. Step 2: Convert to fraction form
    11,989.47/16,540.59 = 7,958.19/x
  3. Step 3: Cross multiply
    11,989.47x = 16,540.59 × 7,958.19
  4. Step 4: Simplify right side
    11,989.47x = 131,633,157.93
  5. Step 5: Solve for x
    x = 131,633,157.93/11,989.47
  6. Step 6: Final answer
    x = 10,979.06

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Double scale
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Similar ratio
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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.