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Finding the Fourth Proportional to 12,796.72, 17,660.08 and 7,131.84

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Solution

The fourth proportional to 12,796.72, 17,660.08 and 7,131.84 is: 9,842.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,796.72 : 17,660.08 = 7,131.84 : x
  2. Step 2: Convert to fraction form
    12,796.72/17,660.08 = 7,131.84/x
  3. Step 3: Cross multiply
    12,796.72x = 17,660.08 × 7,131.84
  4. Step 4: Simplify right side
    12,796.72x = 125,948,864.95
  5. Step 5: Solve for x
    x = 125,948,864.95/12,796.72
  6. Step 6: Final answer
    x = 9,842.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.