Home / 20,205.13-27,881.98-11,128.73

Finding the Fourth Proportional to 20,205.13, 27,881.98 and 11,128.73

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Solution

The fourth proportional to 20,205.13, 27,881.98 and 11,128.73 is: 15,357.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,205.13 : 27,881.98 = 11,128.73 : x
  2. Step 2: Convert to fraction form
    20,205.13/27,881.98 = 11,128.73/x
  3. Step 3: Cross multiply
    20,205.13x = 27,881.98 × 11,128.73
  4. Step 4: Simplify right side
    20,205.13x = 310,290,915.70
  5. Step 5: Solve for x
    x = 310,290,915.70/20,205.13
  6. Step 6: Final answer
    x = 15,357.04

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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.