Home / 20,511.86-28,306.37-11,080.42

Finding the Fourth Proportional to 20,511.86, 28,306.37 and 11,080.42

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Solution

The fourth proportional to 20,511.86, 28,306.37 and 11,080.42 is: 15,290.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.86 : 28,306.37 = 11,080.42 : x
  2. Step 2: Convert to fraction form
    20,511.86/28,306.37 = 11,080.42/x
  3. Step 3: Cross multiply
    20,511.86x = 28,306.37 × 11,080.42
  4. Step 4: Simplify right side
    20,511.86x = 313,646,425.21
  5. Step 5: Solve for x
    x = 313,646,425.21/20,511.86
  6. Step 6: Final answer
    x = 15,290.98

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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.