Home / 12,721.12-19,083.72-6,147.78

Finding the Fourth Proportional to 12,721.12, 19,083.72 and 6,147.78

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Solution

The fourth proportional to 12,721.12, 19,083.72 and 6,147.78 is: 9,222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.12 : 19,083.72 = 6,147.78 : x
  2. Step 2: Convert to fraction form
    12,721.12/19,083.72 = 6,147.78/x
  3. Step 3: Cross multiply
    12,721.12x = 19,083.72 × 6,147.78
  4. Step 4: Simplify right side
    12,721.12x = 117,322,512.14
  5. Step 5: Solve for x
    x = 117,322,512.14/12,721.12
  6. Step 6: Final answer
    x = 9,222.66

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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.