Home / 20,519.12-28,315.68-11,566.88

Finding the Fourth Proportional to 20,519.12, 28,315.68 and 11,566.88

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Solution

The fourth proportional to 20,519.12, 28,315.68 and 11,566.88 is: 15,961.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.12 : 28,315.68 = 11,566.88 : x
  2. Step 2: Convert to fraction form
    20,519.12/28,315.68 = 11,566.88/x
  3. Step 3: Cross multiply
    20,519.12x = 28,315.68 × 11,566.88
  4. Step 4: Simplify right side
    20,519.12x = 327,524,072.68
  5. Step 5: Solve for x
    x = 327,524,072.68/20,519.12
  6. Step 6: Final answer
    x = 15,961.90

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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.