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Finding the Fourth Proportional to 28,861.60, 43,308.60 and 12,218.80

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Solution

The fourth proportional to 28,861.60, 43,308.60 and 12,218.80 is: 18,335.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,861.60 : 43,308.60 = 12,218.80 : x
  2. Step 2: Convert to fraction form
    28,861.60/43,308.60 = 12,218.80/x
  3. Step 3: Cross multiply
    28,861.60x = 43,308.60 × 12,218.80
  4. Step 4: Simplify right side
    28,861.60x = 529,179,121.68
  5. Step 5: Solve for x
    x = 529,179,121.68/28,861.60
  6. Step 6: Final answer
    x = 18,335.06

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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.