Home / 20,883.92-28,820.10-11,451.86

Finding the Fourth Proportional to 20,883.92, 28,820.10 and 11,451.86

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Solution

The fourth proportional to 20,883.92, 28,820.10 and 11,451.86 is: 15,803.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.92 : 28,820.10 = 11,451.86 : x
  2. Step 2: Convert to fraction form
    20,883.92/28,820.10 = 11,451.86/x
  3. Step 3: Cross multiply
    20,883.92x = 28,820.10 × 11,451.86
  4. Step 4: Simplify right side
    20,883.92x = 330,043,750.39
  5. Step 5: Solve for x
    x = 330,043,750.39/20,883.92
  6. Step 6: Final answer
    x = 15,803.73

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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.