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Finding the Fourth Proportional to 20,761.25, 28,650.84 and 11,329.84

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Solution

The fourth proportional to 20,761.25, 28,650.84 and 11,329.84 is: 15,635.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.25 : 28,650.84 = 11,329.84 : x
  2. Step 2: Convert to fraction form
    20,761.25/28,650.84 = 11,329.84/x
  3. Step 3: Cross multiply
    20,761.25x = 28,650.84 × 11,329.84
  4. Step 4: Simplify right side
    20,761.25x = 324,609,289.81
  5. Step 5: Solve for x
    x = 324,609,289.81/20,761.25
  6. Step 6: Final answer
    x = 15,635.34

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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.