Home / 20,121.67-27,759.27-12,159.28

Finding the Fourth Proportional to 20,121.67, 27,759.27 and 12,159.28

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Solution

The fourth proportional to 20,121.67, 27,759.27 and 12,159.28 is: 16,774.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.67 : 27,759.27 = 12,159.28 : x
  2. Step 2: Convert to fraction form
    20,121.67/27,759.27 = 12,159.28/x
  3. Step 3: Cross multiply
    20,121.67x = 27,759.27 × 12,159.28
  4. Step 4: Simplify right side
    20,121.67x = 337,532,736.53
  5. Step 5: Solve for x
    x = 337,532,736.53/20,121.67
  6. Step 6: Final answer
    x = 16,774.59

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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.