Home / 13,147.11-18,143.37-7,179.33

Finding the Fourth Proportional to 13,147.11, 18,143.37 and 7,179.33

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Solution

The fourth proportional to 13,147.11, 18,143.37 and 7,179.33 is: 9,907.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.11 : 18,143.37 = 7,179.33 : x
  2. Step 2: Convert to fraction form
    13,147.11/18,143.37 = 7,179.33/x
  3. Step 3: Cross multiply
    13,147.11x = 18,143.37 × 7,179.33
  4. Step 4: Simplify right side
    13,147.11x = 130,257,240.54
  5. Step 5: Solve for x
    x = 130,257,240.54/13,147.11
  6. Step 6: Final answer
    x = 9,907.67

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Half scale
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Double scale
Find fourth proportional to 13,148.11, 18,144.75 and 7,180.33
Similar ratio
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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.