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Finding the Fourth Proportional to 19,883.60, 29,842.20 and 8,205.20

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Solution

The fourth proportional to 19,883.60, 29,842.20 and 8,205.20 is: 12,314.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,883.60 : 29,842.20 = 8,205.20 : x
  2. Step 2: Convert to fraction form
    19,883.60/29,842.20 = 8,205.20/x
  3. Step 3: Cross multiply
    19,883.60x = 29,842.20 × 8,205.20
  4. Step 4: Simplify right side
    19,883.60x = 244,861,219.44
  5. Step 5: Solve for x
    x = 244,861,219.44/19,883.60
  6. Step 6: Final answer
    x = 12,314.73

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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.