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Finding the Fourth Proportional to 20,661.54, 28,512.71 and 11,230.03

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Solution

The fourth proportional to 20,661.54, 28,512.71 and 11,230.03 is: 15,497.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.54 : 28,512.71 = 11,230.03 : x
  2. Step 2: Convert to fraction form
    20,661.54/28,512.71 = 11,230.03/x
  3. Step 3: Cross multiply
    20,661.54x = 28,512.71 × 11,230.03
  4. Step 4: Simplify right side
    20,661.54x = 320,198,532.53
  5. Step 5: Solve for x
    x = 320,198,532.53/20,661.54
  6. Step 6: Final answer
    x = 15,497.33

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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.