Home / 12,252.80-18,379.20-7,319.90

Finding the Fourth Proportional to 12,252.80, 18,379.20 and 7,319.90

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Solution

The fourth proportional to 12,252.80, 18,379.20 and 7,319.90 is: 10,979.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,252.80 : 18,379.20 = 7,319.90 : x
  2. Step 2: Convert to fraction form
    12,252.80/18,379.20 = 7,319.90/x
  3. Step 3: Cross multiply
    12,252.80x = 18,379.20 × 7,319.90
  4. Step 4: Simplify right side
    12,252.80x = 134,533,906.08
  5. Step 5: Solve for x
    x = 134,533,906.08/12,252.80
  6. Step 6: Final answer
    x = 10,979.85

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Similar ratio
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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.