Home / 20,115.33-27,759.89-12,156.02

Finding the Fourth Proportional to 20,115.33, 27,759.89 and 12,156.02

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Solution

The fourth proportional to 20,115.33, 27,759.89 and 12,156.02 is: 16,775.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.33 : 27,759.89 = 12,156.02 : x
  2. Step 2: Convert to fraction form
    20,115.33/27,759.89 = 12,156.02/x
  3. Step 3: Cross multiply
    20,115.33x = 27,759.89 × 12,156.02
  4. Step 4: Simplify right side
    20,115.33x = 337,449,578.46
  5. Step 5: Solve for x
    x = 337,449,578.46/20,115.33
  6. Step 6: Final answer
    x = 16,775.74

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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.