Home / 13,179.23-18,191.97-8,147.31

Finding the Fourth Proportional to 13,179.23, 18,191.97 and 8,147.31

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Solution

The fourth proportional to 13,179.23, 18,191.97 and 8,147.31 is: 11,246.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.23 : 18,191.97 = 8,147.31 : x
  2. Step 2: Convert to fraction form
    13,179.23/18,191.97 = 8,147.31/x
  3. Step 3: Cross multiply
    13,179.23x = 18,191.97 × 8,147.31
  4. Step 4: Simplify right side
    13,179.23x = 148,215,619.10
  5. Step 5: Solve for x
    x = 148,215,619.10/13,179.23
  6. Step 6: Final answer
    x = 11,246.15

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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.