Home / 18,920.41-28,380.31-6,449.12

Finding the Fourth Proportional to 18,920.41, 28,380.31 and 6,449.12

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Solution

The fourth proportional to 18,920.41, 28,380.31 and 6,449.12 is: 9,673.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.41 : 28,380.31 = 6,449.12 : x
  2. Step 2: Convert to fraction form
    18,920.41/28,380.31 = 6,449.12/x
  3. Step 3: Cross multiply
    18,920.41x = 28,380.31 × 6,449.12
  4. Step 4: Simplify right side
    18,920.41x = 183,027,997.41
  5. Step 5: Solve for x
    x = 183,027,997.41/18,920.41
  6. Step 6: Final answer
    x = 9,673.57

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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.