Home / 20,811.60-28,711.80-11,734.92

Finding the Fourth Proportional to 20,811.60, 28,711.80 and 11,734.92

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Solution

The fourth proportional to 20,811.60, 28,711.80 and 11,734.92 is: 16,189.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.60 : 28,711.80 = 11,734.92 : x
  2. Step 2: Convert to fraction form
    20,811.60/28,711.80 = 11,734.92/x
  3. Step 3: Cross multiply
    20,811.60x = 28,711.80 × 11,734.92
  4. Step 4: Simplify right side
    20,811.60x = 336,930,676.06
  5. Step 5: Solve for x
    x = 336,930,676.06/20,811.60
  6. Step 6: Final answer
    x = 16,189.56

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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.