Home / 12,518.45-18,780.41-3,633.90

Finding the Fourth Proportional to 12,518.45, 18,780.41 and 3,633.90

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Solution

The fourth proportional to 12,518.45, 18,780.41 and 3,633.90 is: 5,451.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,518.45 : 18,780.41 = 3,633.90 : x
  2. Step 2: Convert to fraction form
    12,518.45/18,780.41 = 3,633.90/x
  3. Step 3: Cross multiply
    12,518.45x = 18,780.41 × 3,633.90
  4. Step 4: Simplify right side
    12,518.45x = 68,246,131.90
  5. Step 5: Solve for x
    x = 68,246,131.90/12,518.45
  6. Step 6: Final answer
    x = 5,451.64

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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.