Home / 12,720.38-19,081.10-3,486.38

Finding the Fourth Proportional to 12,720.38, 19,081.10 and 3,486.38

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Solution

The fourth proportional to 12,720.38, 19,081.10 and 3,486.38 is: 5,229.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.38 : 19,081.10 = 3,486.38 : x
  2. Step 2: Convert to fraction form
    12,720.38/19,081.10 = 3,486.38/x
  3. Step 3: Cross multiply
    12,720.38x = 19,081.10 × 3,486.38
  4. Step 4: Simplify right side
    12,720.38x = 66,523,878.73
  5. Step 5: Solve for x
    x = 66,523,878.73/12,720.38
  6. Step 6: Final answer
    x = 5,229.71

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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.