Home / 20,451.63-28,221.96-11,499.03

Finding the Fourth Proportional to 20,451.63, 28,221.96 and 11,499.03

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Solution

The fourth proportional to 20,451.63, 28,221.96 and 11,499.03 is: 15,867.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.63 : 28,221.96 = 11,499.03 : x
  2. Step 2: Convert to fraction form
    20,451.63/28,221.96 = 11,499.03/x
  3. Step 3: Cross multiply
    20,451.63x = 28,221.96 × 11,499.03
  4. Step 4: Simplify right side
    20,451.63x = 324,525,164.70
  5. Step 5: Solve for x
    x = 324,525,164.70/20,451.63
  6. Step 6: Final answer
    x = 15,867.94

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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.