Home / 20,690.26-30,996.34-12,231.50

Finding the Fourth Proportional to 20,690.26, 30,996.34 and 12,231.50

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Solution

The fourth proportional to 20,690.26, 30,996.34 and 12,231.50 is: 18,324.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.26 : 30,996.34 = 12,231.50 : x
  2. Step 2: Convert to fraction form
    20,690.26/30,996.34 = 12,231.50/x
  3. Step 3: Cross multiply
    20,690.26x = 30,996.34 × 12,231.50
  4. Step 4: Simplify right side
    20,690.26x = 379,131,547.15
  5. Step 5: Solve for x
    x = 379,131,547.15/20,690.26
  6. Step 6: Final answer
    x = 18,324.16

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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.