Home / 13,783.12-19,022.12-8,119.66

Finding the Fourth Proportional to 13,783.12, 19,022.12 and 8,119.66

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Solution

The fourth proportional to 13,783.12, 19,022.12 and 8,119.66 is: 11,205.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,783.12 : 19,022.12 = 8,119.66 : x
  2. Step 2: Convert to fraction form
    13,783.12/19,022.12 = 8,119.66/x
  3. Step 3: Cross multiply
    13,783.12x = 19,022.12 × 8,119.66
  4. Step 4: Simplify right side
    13,783.12x = 154,453,146.88
  5. Step 5: Solve for x
    x = 154,453,146.88/13,783.12
  6. Step 6: Final answer
    x = 11,205.96

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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.