Home / 20,451.27-28,221.99-11,376.60

Finding the Fourth Proportional to 20,451.27, 28,221.99 and 11,376.60

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Solution

The fourth proportional to 20,451.27, 28,221.99 and 11,376.60 is: 15,699.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.27 : 28,221.99 = 11,376.60 : x
  2. Step 2: Convert to fraction form
    20,451.27/28,221.99 = 11,376.60/x
  3. Step 3: Cross multiply
    20,451.27x = 28,221.99 × 11,376.60
  4. Step 4: Simplify right side
    20,451.27x = 321,070,291.43
  5. Step 5: Solve for x
    x = 321,070,291.43/20,451.27
  6. Step 6: Final answer
    x = 15,699.28

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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.