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Finding the Fourth Proportional to 12,321.78, 17,003.70 and 6,732.78

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Solution

The fourth proportional to 12,321.78, 17,003.70 and 6,732.78 is: 9,291.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.78 : 17,003.70 = 6,732.78 : x
  2. Step 2: Convert to fraction form
    12,321.78/17,003.70 = 6,732.78/x
  3. Step 3: Cross multiply
    12,321.78x = 17,003.70 × 6,732.78
  4. Step 4: Simplify right side
    12,321.78x = 114,482,171.29
  5. Step 5: Solve for x
    x = 114,482,171.29/12,321.78
  6. Step 6: Final answer
    x = 9,291.04

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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.