Home / 18,685.22-27,996.68-13,128.61

Finding the Fourth Proportional to 18,685.22, 27,996.68 and 13,128.61

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Solution

The fourth proportional to 18,685.22, 27,996.68 and 13,128.61 is: 19,671.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.22 : 27,996.68 = 13,128.61 : x
  2. Step 2: Convert to fraction form
    18,685.22/27,996.68 = 13,128.61/x
  3. Step 3: Cross multiply
    18,685.22x = 27,996.68 × 13,128.61
  4. Step 4: Simplify right side
    18,685.22x = 367,557,493.01
  5. Step 5: Solve for x
    x = 367,557,493.01/18,685.22
  6. Step 6: Final answer
    x = 19,671.03

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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.