Home / 20,768.97-31,121.82-15,225.96

Finding the Fourth Proportional to 20,768.97, 31,121.82 and 15,225.96

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Solution

The fourth proportional to 20,768.97, 31,121.82 and 15,225.96 is: 22,815.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.97 : 31,121.82 = 15,225.96 : x
  2. Step 2: Convert to fraction form
    20,768.97/31,121.82 = 15,225.96/x
  3. Step 3: Cross multiply
    20,768.97x = 31,121.82 × 15,225.96
  4. Step 4: Simplify right side
    20,768.97x = 473,859,586.45
  5. Step 5: Solve for x
    x = 473,859,586.45/20,768.97
  6. Step 6: Final answer
    x = 22,815.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.