Home / 12,331.20-18,496.80-7,147.20

Finding the Fourth Proportional to 12,331.20, 18,496.80 and 7,147.20

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Solution

The fourth proportional to 12,331.20, 18,496.80 and 7,147.20 is: 10,720.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,331.20 : 18,496.80 = 7,147.20 : x
  2. Step 2: Convert to fraction form
    12,331.20/18,496.80 = 7,147.20/x
  3. Step 3: Cross multiply
    12,331.20x = 18,496.80 × 7,147.20
  4. Step 4: Simplify right side
    12,331.20x = 132,200,328.96
  5. Step 5: Solve for x
    x = 132,200,328.96/12,331.20
  6. Step 6: Final answer
    x = 10,720.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.