Home / 20,883.12-28,819.44-11,451.72

Finding the Fourth Proportional to 20,883.12, 28,819.44 and 11,451.72

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Solution

The fourth proportional to 20,883.12, 28,819.44 and 11,451.72 is: 15,803.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.12 : 28,819.44 = 11,451.72 : x
  2. Step 2: Convert to fraction form
    20,883.12/28,819.44 = 11,451.72/x
  3. Step 3: Cross multiply
    20,883.12x = 28,819.44 × 11,451.72
  4. Step 4: Simplify right side
    20,883.12x = 330,032,157.44
  5. Step 5: Solve for x
    x = 330,032,157.44/20,883.12
  6. Step 6: Final answer
    x = 15,803.78

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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.