Home / 20,886.20-28,822.58-11,811.42

Finding the Fourth Proportional to 20,886.20, 28,822.58 and 11,811.42

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Solution

The fourth proportional to 20,886.20, 28,822.58 and 11,811.42 is: 16,299.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.20 : 28,822.58 = 11,811.42 : x
  2. Step 2: Convert to fraction form
    20,886.20/28,822.58 = 11,811.42/x
  3. Step 3: Cross multiply
    20,886.20x = 28,822.58 × 11,811.42
  4. Step 4: Simplify right side
    20,886.20x = 340,435,627.39
  5. Step 5: Solve for x
    x = 340,435,627.39/20,886.20
  6. Step 6: Final answer
    x = 16,299.55

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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.