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Finding the Fourth Proportional to 36,385.40, 54,578.10 and 18,860.60

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Solution

The fourth proportional to 36,385.40, 54,578.10 and 18,860.60 is: 28,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,385.40 : 54,578.10 = 18,860.60 : x
  2. Step 2: Convert to fraction form
    36,385.40/54,578.10 = 18,860.60/x
  3. Step 3: Cross multiply
    36,385.40x = 54,578.10 × 18,860.60
  4. Step 4: Simplify right side
    36,385.40x = 1,029,375,712.86
  5. Step 5: Solve for x
    x = 1,029,375,712.86/36,385.40
  6. Step 6: Final answer
    x = 28,290.90

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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.