Home / 13,147.34-18,143.21-8,109.54

Finding the Fourth Proportional to 13,147.34, 18,143.21 and 8,109.54

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Solution

The fourth proportional to 13,147.34, 18,143.21 and 8,109.54 is: 11,191.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.34 : 18,143.21 = 8,109.54 : x
  2. Step 2: Convert to fraction form
    13,147.34/18,143.21 = 8,109.54/x
  3. Step 3: Cross multiply
    13,147.34x = 18,143.21 × 8,109.54
  4. Step 4: Simplify right side
    13,147.34x = 147,133,046.68
  5. Step 5: Solve for x
    x = 147,133,046.68/13,147.34
  6. Step 6: Final answer
    x = 11,191.09

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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.