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Finding the Fourth Proportional to 27,310.20, 40,965.30 and 18,999.60

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Solution

The fourth proportional to 27,310.20, 40,965.30 and 18,999.60 is: 28,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,310.20 : 40,965.30 = 18,999.60 : x
  2. Step 2: Convert to fraction form
    27,310.20/40,965.30 = 18,999.60/x
  3. Step 3: Cross multiply
    27,310.20x = 40,965.30 × 18,999.60
  4. Step 4: Simplify right side
    27,310.20x = 778,324,313.88
  5. Step 5: Solve for x
    x = 778,324,313.88/27,310.20
  6. Step 6: Final answer
    x = 28,499.40

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Similar ratio
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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.