Home / 13,893.78-19,182.34-12,399.12

Finding the Fourth Proportional to 13,893.78, 19,182.34 and 12,399.12

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Solution

The fourth proportional to 13,893.78, 19,182.34 and 12,399.12 is: 17,118.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,893.78 : 19,182.34 = 12,399.12 : x
  2. Step 2: Convert to fraction form
    13,893.78/19,182.34 = 12,399.12/x
  3. Step 3: Cross multiply
    13,893.78x = 19,182.34 × 12,399.12
  4. Step 4: Simplify right side
    13,893.78x = 237,844,135.54
  5. Step 5: Solve for x
    x = 237,844,135.54/13,893.78
  6. Step 6: Final answer
    x = 17,118.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.