Home / 10,786.50-16,179.75-3,390.80

Finding the Fourth Proportional to 10,786.50, 16,179.75 and 3,390.80

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Solution

The fourth proportional to 10,786.50, 16,179.75 and 3,390.80 is: 5,086.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,786.50 : 16,179.75 = 3,390.80 : x
  2. Step 2: Convert to fraction form
    10,786.50/16,179.75 = 3,390.80/x
  3. Step 3: Cross multiply
    10,786.50x = 16,179.75 × 3,390.80
  4. Step 4: Simplify right side
    10,786.50x = 54,862,215.40
  5. Step 5: Solve for x
    x = 54,862,215.40/10,786.50
  6. Step 6: Final answer
    x = 5,086.19

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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.