Home / 20,121.63-27,766.50-12,168.24

Finding the Fourth Proportional to 20,121.63, 27,766.50 and 12,168.24

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Solution

The fourth proportional to 20,121.63, 27,766.50 and 12,168.24 is: 16,791.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.63 : 27,766.50 = 12,168.24 : x
  2. Step 2: Convert to fraction form
    20,121.63/27,766.50 = 12,168.24/x
  3. Step 3: Cross multiply
    20,121.63x = 27,766.50 × 12,168.24
  4. Step 4: Simplify right side
    20,121.63x = 337,869,435.96
  5. Step 5: Solve for x
    x = 337,869,435.96/20,121.63
  6. Step 6: Final answer
    x = 16,791.36

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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.