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Finding the Fourth Proportional to 12,393.52, 17,103.11 and 6,728.28

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Solution

The fourth proportional to 12,393.52, 17,103.11 and 6,728.28 is: 9,285.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393.52 : 17,103.11 = 6,728.28 : x
  2. Step 2: Convert to fraction form
    12,393.52/17,103.11 = 6,728.28/x
  3. Step 3: Cross multiply
    12,393.52x = 17,103.11 × 6,728.28
  4. Step 4: Simplify right side
    12,393.52x = 115,074,530.30
  5. Step 5: Solve for x
    x = 115,074,530.30/12,393.52
  6. Step 6: Final answer
    x = 9,285.05

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Half scale
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Similar ratio
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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.