Home / 12,379.20-18,525.60-11,342.40

Finding the Fourth Proportional to 12,379.20, 18,525.60 and 11,342.40

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Solution

The fourth proportional to 12,379.20, 18,525.60 and 11,342.40 is: 16,974.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.20 : 18,525.60 = 11,342.40 : x
  2. Step 2: Convert to fraction form
    12,379.20/18,525.60 = 11,342.40/x
  3. Step 3: Cross multiply
    12,379.20x = 18,525.60 × 11,342.40
  4. Step 4: Simplify right side
    12,379.20x = 210,124,765.44
  5. Step 5: Solve for x
    x = 210,124,765.44/12,379.20
  6. Step 6: Final answer
    x = 16,974.02

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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.