Home / 20,540.75-28,343.79-11,587.73

Finding the Fourth Proportional to 20,540.75, 28,343.79 and 11,587.73

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Solution

The fourth proportional to 20,540.75, 28,343.79 and 11,587.73 is: 15,989.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.75 : 28,343.79 = 11,587.73 : x
  2. Step 2: Convert to fraction form
    20,540.75/28,343.79 = 11,587.73/x
  3. Step 3: Cross multiply
    20,540.75x = 28,343.79 × 11,587.73
  4. Step 4: Simplify right side
    20,540.75x = 328,440,043.98
  5. Step 5: Solve for x
    x = 328,440,043.98/20,540.75
  6. Step 6: Final answer
    x = 15,989.69

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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.