Home / 13,858.20-19,137.78-11,857.05

Finding the Fourth Proportional to 13,858.20, 19,137.78 and 11,857.05

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Solution

The fourth proportional to 13,858.20, 19,137.78 and 11,857.05 is: 16,374.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,858.20 : 19,137.78 = 11,857.05 : x
  2. Step 2: Convert to fraction form
    13,858.20/19,137.78 = 11,857.05/x
  3. Step 3: Cross multiply
    13,858.20x = 19,137.78 × 11,857.05
  4. Step 4: Simplify right side
    13,858.20x = 226,917,614.35
  5. Step 5: Solve for x
    x = 226,917,614.35/13,858.20
  6. Step 6: Final answer
    x = 16,374.25

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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.