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Finding the Fourth Proportional to 10,796.80, 16,195.20 and 8,172.40

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Solution

The fourth proportional to 10,796.80, 16,195.20 and 8,172.40 is: 12,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,796.80 : 16,195.20 = 8,172.40 : x
  2. Step 2: Convert to fraction form
    10,796.80/16,195.20 = 8,172.40/x
  3. Step 3: Cross multiply
    10,796.80x = 16,195.20 × 8,172.40
  4. Step 4: Simplify right side
    10,796.80x = 132,353,652.48
  5. Step 5: Solve for x
    x = 132,353,652.48/10,796.80
  6. Step 6: Final answer
    x = 12,258.60

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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.