Home / 13,786.89-19,022.60-8,121.20

Finding the Fourth Proportional to 13,786.89, 19,022.60 and 8,121.20

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Solution

The fourth proportional to 13,786.89, 19,022.60 and 8,121.20 is: 11,205.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.89 : 19,022.60 = 8,121.20 : x
  2. Step 2: Convert to fraction form
    13,786.89/19,022.60 = 8,121.20/x
  3. Step 3: Cross multiply
    13,786.89x = 19,022.60 × 8,121.20
  4. Step 4: Simplify right side
    13,786.89x = 154,486,203.40
  5. Step 5: Solve for x
    x = 154,486,203.40/13,786.89
  6. Step 6: Final answer
    x = 11,205.30

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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.