Home / 20,447.78-28,217.94-11,495.30

Finding the Fourth Proportional to 20,447.78, 28,217.94 and 11,495.30

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Solution

The fourth proportional to 20,447.78, 28,217.94 and 11,495.30 is: 15,863.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.78 : 28,217.94 = 11,495.30 : x
  2. Step 2: Convert to fraction form
    20,447.78/28,217.94 = 11,495.30/x
  3. Step 3: Cross multiply
    20,447.78x = 28,217.94 × 11,495.30
  4. Step 4: Simplify right side
    20,447.78x = 324,373,685.68
  5. Step 5: Solve for x
    x = 324,373,685.68/20,447.78
  6. Step 6: Final answer
    x = 15,863.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.