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Finding the Fourth Proportional to 12,995.37, 17,921.66 and 8,517.49

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Solution

The fourth proportional to 12,995.37, 17,921.66 and 8,517.49 is: 11,746.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,995.37 : 17,921.66 = 8,517.49 : x
  2. Step 2: Convert to fraction form
    12,995.37/17,921.66 = 8,517.49/x
  3. Step 3: Cross multiply
    12,995.37x = 17,921.66 × 8,517.49
  4. Step 4: Simplify right side
    12,995.37x = 152,647,472.44
  5. Step 5: Solve for x
    x = 152,647,472.44/12,995.37
  6. Step 6: Final answer
    x = 11,746.30

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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.