Home / 20,850.51-28,774.40-11,419.59

Finding the Fourth Proportional to 20,850.51, 28,774.40 and 11,419.59

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Solution

The fourth proportional to 20,850.51, 28,774.40 and 11,419.59 is: 15,759.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.51 : 28,774.40 = 11,419.59 : x
  2. Step 2: Convert to fraction form
    20,850.51/28,774.40 = 11,419.59/x
  3. Step 3: Cross multiply
    20,850.51x = 28,774.40 × 11,419.59
  4. Step 4: Simplify right side
    20,850.51x = 328,591,793.40
  5. Step 5: Solve for x
    x = 328,591,793.40/20,850.51
  6. Step 6: Final answer
    x = 15,759.41

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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.