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Finding the Fourth Proportional to 28,863.60, 43,311.60 and 12,220.80

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Solution

The fourth proportional to 28,863.60, 43,311.60 and 12,220.80 is: 18,338.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,863.60 : 43,311.60 = 12,220.80 : x
  2. Step 2: Convert to fraction form
    28,863.60/43,311.60 = 12,220.80/x
  3. Step 3: Cross multiply
    28,863.60x = 43,311.60 × 12,220.80
  4. Step 4: Simplify right side
    28,863.60x = 529,302,401.28
  5. Step 5: Solve for x
    x = 529,302,401.28/28,863.60
  6. Step 6: Final answer
    x = 18,338.06

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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.