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Finding the Fourth Proportional to 20,649.84, 28,480.92 and 13,924.82

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Solution

The fourth proportional to 20,649.84, 28,480.92 and 13,924.82 is: 19,205.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.84 : 28,480.92 = 13,924.82 : x
  2. Step 2: Convert to fraction form
    20,649.84/28,480.92 = 13,924.82/x
  3. Step 3: Cross multiply
    20,649.84x = 28,480.92 × 13,924.82
  4. Step 4: Simplify right side
    20,649.84x = 396,591,542.03
  5. Step 5: Solve for x
    x = 396,591,542.03/20,649.84
  6. Step 6: Final answer
    x = 19,205.55

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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.