Home / 20,786.74-31,187.40-10,786.70

Finding the Fourth Proportional to 20,786.74, 31,187.40 and 10,786.70

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Solution

The fourth proportional to 20,786.74, 31,187.40 and 10,786.70 is: 16,183.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.74 : 31,187.40 = 10,786.70 : x
  2. Step 2: Convert to fraction form
    20,786.74/31,187.40 = 10,786.70/x
  3. Step 3: Cross multiply
    20,786.74x = 31,187.40 × 10,786.70
  4. Step 4: Simplify right side
    20,786.74x = 336,409,127.58
  5. Step 5: Solve for x
    x = 336,409,127.58/20,786.74
  6. Step 6: Final answer
    x = 16,183.83

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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.