Home / 20,826.75-28,740.20-11,877.14

Finding the Fourth Proportional to 20,826.75, 28,740.20 and 11,877.14

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Solution

The fourth proportional to 20,826.75, 28,740.20 and 11,877.14 is: 16,390.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.75 : 28,740.20 = 11,877.14 : x
  2. Step 2: Convert to fraction form
    20,826.75/28,740.20 = 11,877.14/x
  3. Step 3: Cross multiply
    20,826.75x = 28,740.20 × 11,877.14
  4. Step 4: Simplify right side
    20,826.75x = 341,351,175.94
  5. Step 5: Solve for x
    x = 341,351,175.94/20,826.75
  6. Step 6: Final answer
    x = 16,390.04

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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.