Home / 13,634.80-18,811.49-11,112.57

Finding the Fourth Proportional to 13,634.80, 18,811.49 and 11,112.57

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Solution

The fourth proportional to 13,634.80, 18,811.49 and 11,112.57 is: 15,331.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,634.80 : 18,811.49 = 11,112.57 : x
  2. Step 2: Convert to fraction form
    13,634.80/18,811.49 = 11,112.57/x
  3. Step 3: Cross multiply
    13,634.80x = 18,811.49 × 11,112.57
  4. Step 4: Simplify right side
    13,634.80x = 209,043,999.43
  5. Step 5: Solve for x
    x = 209,043,999.43/13,634.80
  6. Step 6: Final answer
    x = 15,331.66

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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.