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Finding the Fourth Proportional to 38,608.80, 57,920.04 and 12,310.80

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Solution

The fourth proportional to 38,608.80, 57,920.04 and 12,310.80 is: 18,468.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,608.80 : 57,920.04 = 12,310.80 : x
  2. Step 2: Convert to fraction form
    38,608.80/57,920.04 = 12,310.80/x
  3. Step 3: Cross multiply
    38,608.80x = 57,920.04 × 12,310.80
  4. Step 4: Simplify right side
    38,608.80x = 713,042,028.43
  5. Step 5: Solve for x
    x = 713,042,028.43/38,608.80
  6. Step 6: Final answer
    x = 18,468.38

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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.