Home / 20,786.82-31,190.76-10,397.76

Finding the Fourth Proportional to 20,786.82, 31,190.76 and 10,397.76

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Solution

The fourth proportional to 20,786.82, 31,190.76 and 10,397.76 is: 15,601.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.82 : 31,190.76 = 10,397.76 : x
  2. Step 2: Convert to fraction form
    20,786.82/31,190.76 = 10,397.76/x
  3. Step 3: Cross multiply
    20,786.82x = 31,190.76 × 10,397.76
  4. Step 4: Simplify right side
    20,786.82x = 324,314,036.70
  5. Step 5: Solve for x
    x = 324,314,036.70/20,786.82
  6. Step 6: Final answer
    x = 15,601.91

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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.