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Finding the Fourth Proportional to 12,016.81, 18,019.31 and 7,020.44

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Solution

The fourth proportional to 12,016.81, 18,019.31 and 7,020.44 is: 10,527.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,016.81 : 18,019.31 = 7,020.44 : x
  2. Step 2: Convert to fraction form
    12,016.81/18,019.31 = 7,020.44/x
  3. Step 3: Cross multiply
    12,016.81x = 18,019.31 × 7,020.44
  4. Step 4: Simplify right side
    12,016.81x = 126,503,427.07
  5. Step 5: Solve for x
    x = 126,503,427.07/12,016.81
  6. Step 6: Final answer
    x = 10,527.20

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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.