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Finding the Fourth Proportional to 8,912.80, 13,372.40 and 8,592.80

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Solution

The fourth proportional to 8,912.80, 13,372.40 and 8,592.80 is: 12,892.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.80 : 13,372.40 = 8,592.80 : x
  2. Step 2: Convert to fraction form
    8,912.80/13,372.40 = 8,592.80/x
  3. Step 3: Cross multiply
    8,912.80x = 13,372.40 × 8,592.80
  4. Step 4: Simplify right side
    8,912.80x = 114,906,358.72
  5. Step 5: Solve for x
    x = 114,906,358.72/8,912.80
  6. Step 6: Final answer
    x = 12,892.29

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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.