Home / 12,857.31-19,285.74-4,092.12

Finding the Fourth Proportional to 12,857.31, 19,285.74 and 4,092.12

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Solution

The fourth proportional to 12,857.31, 19,285.74 and 4,092.12 is: 6,138.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.31 : 19,285.74 = 4,092.12 : x
  2. Step 2: Convert to fraction form
    12,857.31/19,285.74 = 4,092.12/x
  3. Step 3: Cross multiply
    12,857.31x = 19,285.74 × 4,092.12
  4. Step 4: Simplify right side
    12,857.31x = 78,919,562.37
  5. Step 5: Solve for x
    x = 78,919,562.37/12,857.31
  6. Step 6: Final answer
    x = 6,138.11

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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.