Home / 18,721.26-25,836.84-11,169.90

Finding the Fourth Proportional to 18,721.26, 25,836.84 and 11,169.90

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Solution

The fourth proportional to 18,721.26, 25,836.84 and 11,169.90 is: 15,415.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.26 : 25,836.84 = 11,169.90 : x
  2. Step 2: Convert to fraction form
    18,721.26/25,836.84 = 11,169.90/x
  3. Step 3: Cross multiply
    18,721.26x = 25,836.84 × 11,169.90
  4. Step 4: Simplify right side
    18,721.26x = 288,594,919.12
  5. Step 5: Solve for x
    x = 288,594,919.12/18,721.26
  6. Step 6: Final answer
    x = 15,415.36

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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.