Home / 20,531.67-30,855.21-12,213.19

Finding the Fourth Proportional to 20,531.67, 30,855.21 and 12,213.19

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Solution

The fourth proportional to 20,531.67, 30,855.21 and 12,213.19 is: 18,354.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.67 : 30,855.21 = 12,213.19 : x
  2. Step 2: Convert to fraction form
    20,531.67/30,855.21 = 12,213.19/x
  3. Step 3: Cross multiply
    20,531.67x = 30,855.21 × 12,213.19
  4. Step 4: Simplify right side
    20,531.67x = 376,840,542.22
  5. Step 5: Solve for x
    x = 376,840,542.22/20,531.67
  6. Step 6: Final answer
    x = 18,354.11

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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.