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Finding the Fourth Proportional to 38,512.80, 57,777.30 and 21,859.20

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Solution

The fourth proportional to 38,512.80, 57,777.30 and 21,859.20 is: 32,793.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,512.80 : 57,777.30 = 21,859.20 : x
  2. Step 2: Convert to fraction form
    38,512.80/57,777.30 = 21,859.20/x
  3. Step 3: Cross multiply
    38,512.80x = 57,777.30 × 21,859.20
  4. Step 4: Simplify right side
    38,512.80x = 1,262,965,556.16
  5. Step 5: Solve for x
    x = 1,262,965,556.16/38,512.80
  6. Step 6: Final answer
    x = 32,793.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.