Home / 12,820.75-19,226.50-5,425.78

Finding the Fourth Proportional to 12,820.75, 19,226.50 and 5,425.78

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Solution

The fourth proportional to 12,820.75, 19,226.50 and 5,425.78 is: 8,136.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,820.75 : 19,226.50 = 5,425.78 : x
  2. Step 2: Convert to fraction form
    12,820.75/19,226.50 = 5,425.78/x
  3. Step 3: Cross multiply
    12,820.75x = 19,226.50 × 5,425.78
  4. Step 4: Simplify right side
    12,820.75x = 104,318,759.17
  5. Step 5: Solve for x
    x = 104,318,759.17/12,820.75
  6. Step 6: Final answer
    x = 8,136.71

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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.