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Finding the Fourth Proportional to 20,745.44, 28,627.84 and 11,313.44

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Solution

The fourth proportional to 20,745.44, 28,627.84 and 11,313.44 is: 15,612.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.44 : 28,627.84 = 11,313.44 : x
  2. Step 2: Convert to fraction form
    20,745.44/28,627.84 = 11,313.44/x
  3. Step 3: Cross multiply
    20,745.44x = 28,627.84 × 11,313.44
  4. Step 4: Simplify right side
    20,745.44x = 323,879,350.17
  5. Step 5: Solve for x
    x = 323,879,350.17/20,745.44
  6. Step 6: Final answer
    x = 15,612.07

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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.