Home / 20,451.45-28,221.30-11,499.93

Finding the Fourth Proportional to 20,451.45, 28,221.30 and 11,499.93

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Solution

The fourth proportional to 20,451.45, 28,221.30 and 11,499.93 is: 15,868.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.45 : 28,221.30 = 11,499.93 : x
  2. Step 2: Convert to fraction form
    20,451.45/28,221.30 = 11,499.93/x
  3. Step 3: Cross multiply
    20,451.45x = 28,221.30 × 11,499.93
  4. Step 4: Simplify right side
    20,451.45x = 324,542,974.51
  5. Step 5: Solve for x
    x = 324,542,974.51/20,451.45
  6. Step 6: Final answer
    x = 15,868.95

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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.