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Finding the Fourth Proportional to 8,488.80, 12,796.20 and 7,912.80

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Solution

The fourth proportional to 8,488.80, 12,796.20 and 7,912.80 is: 11,927.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,488.80 : 12,796.20 = 7,912.80 : x
  2. Step 2: Convert to fraction form
    8,488.80/12,796.20 = 7,912.80/x
  3. Step 3: Cross multiply
    8,488.80x = 12,796.20 × 7,912.80
  4. Step 4: Simplify right side
    8,488.80x = 101,253,771.36
  5. Step 5: Solve for x
    x = 101,253,771.36/8,488.80
  6. Step 6: Final answer
    x = 11,927.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.