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Finding the Fourth Proportional to 20,481.60, 30,729.60 and 8,798.40

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Solution

The fourth proportional to 20,481.60, 30,729.60 and 8,798.40 is: 13,200.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.60 : 30,729.60 = 8,798.40 : x
  2. Step 2: Convert to fraction form
    20,481.60/30,729.60 = 8,798.40/x
  3. Step 3: Cross multiply
    20,481.60x = 30,729.60 × 8,798.40
  4. Step 4: Simplify right side
    20,481.60x = 270,371,312.64
  5. Step 5: Solve for x
    x = 270,371,312.64/20,481.60
  6. Step 6: Final answer
    x = 13,200.69

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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.