Home / 20,882.20-28,816.12-11,450.84

Finding the Fourth Proportional to 20,882.20, 28,816.12 and 11,450.84

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Solution

The fourth proportional to 20,882.20, 28,816.12 and 11,450.84 is: 15,801.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.20 : 28,816.12 = 11,450.84 : x
  2. Step 2: Convert to fraction form
    20,882.20/28,816.12 = 11,450.84/x
  3. Step 3: Cross multiply
    20,882.20x = 28,816.12 × 11,450.84
  4. Step 4: Simplify right side
    20,882.20x = 329,968,779.54
  5. Step 5: Solve for x
    x = 329,968,779.54/20,882.20
  6. Step 6: Final answer
    x = 15,801.44

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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.