Home / 28,213.83-42,321.21-13,419.75

Finding the Fourth Proportional to 28,213.83, 42,321.21 and 13,419.75

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Solution

The fourth proportional to 28,213.83, 42,321.21 and 13,419.75 is: 20,129.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.83 : 42,321.21 = 13,419.75 : x
  2. Step 2: Convert to fraction form
    28,213.83/42,321.21 = 13,419.75/x
  3. Step 3: Cross multiply
    28,213.83x = 42,321.21 × 13,419.75
  4. Step 4: Simplify right side
    28,213.83x = 567,940,057.90
  5. Step 5: Solve for x
    x = 567,940,057.90/28,213.83
  6. Step 6: Final answer
    x = 20,129.85

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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.