Home / 20,961.22-28,926.35-11,888.30

Finding the Fourth Proportional to 20,961.22, 28,926.35 and 11,888.30

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Solution

The fourth proportional to 20,961.22, 28,926.35 and 11,888.30 is: 16,405.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.22 : 28,926.35 = 11,888.30 : x
  2. Step 2: Convert to fraction form
    20,961.22/28,926.35 = 11,888.30/x
  3. Step 3: Cross multiply
    20,961.22x = 28,926.35 × 11,888.30
  4. Step 4: Simplify right side
    20,961.22x = 343,885,067.26
  5. Step 5: Solve for x
    x = 343,885,067.26/20,961.22
  6. Step 6: Final answer
    x = 16,405.78

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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.