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Finding the Fourth Proportional to 12,481.95, 17,201.40 and 8,939.01

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Solution

The fourth proportional to 12,481.95, 17,201.40 and 8,939.01 is: 12,318.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481.95 : 17,201.40 = 8,939.01 : x
  2. Step 2: Convert to fraction form
    12,481.95/17,201.40 = 8,939.01/x
  3. Step 3: Cross multiply
    12,481.95x = 17,201.40 × 8,939.01
  4. Step 4: Simplify right side
    12,481.95x = 153,763,486.61
  5. Step 5: Solve for x
    x = 153,763,486.61/12,481.95
  6. Step 6: Final answer
    x = 12,318.87

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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.