Home / 20,851.70-28,775.83-11,900.04

Finding the Fourth Proportional to 20,851.70, 28,775.83 and 11,900.04

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Solution

The fourth proportional to 20,851.70, 28,775.83 and 11,900.04 is: 16,422.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.70 : 28,775.83 = 11,900.04 : x
  2. Step 2: Convert to fraction form
    20,851.70/28,775.83 = 11,900.04/x
  3. Step 3: Cross multiply
    20,851.70x = 28,775.83 × 11,900.04
  4. Step 4: Simplify right side
    20,851.70x = 342,433,542.91
  5. Step 5: Solve for x
    x = 342,433,542.91/20,851.70
  6. Step 6: Final answer
    x = 16,422.33

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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.