Home / 20,730.97-28,608.80-11,781.45

Finding the Fourth Proportional to 20,730.97, 28,608.80 and 11,781.45

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Solution

The fourth proportional to 20,730.97, 28,608.80 and 11,781.45 is: 16,258.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.97 : 28,608.80 = 11,781.45 : x
  2. Step 2: Convert to fraction form
    20,730.97/28,608.80 = 11,781.45/x
  3. Step 3: Cross multiply
    20,730.97x = 28,608.80 × 11,781.45
  4. Step 4: Simplify right side
    20,730.97x = 337,053,087.85
  5. Step 5: Solve for x
    x = 337,053,087.85/20,730.97
  6. Step 6: Final answer
    x = 16,258.43

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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.