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Finding the Fourth Proportional to 12,843.36, 17,718.48 and 8,644.32

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Solution

The fourth proportional to 12,843.36, 17,718.48 and 8,644.32 is: 11,925.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,843.36 : 17,718.48 = 8,644.32 : x
  2. Step 2: Convert to fraction form
    12,843.36/17,718.48 = 8,644.32/x
  3. Step 3: Cross multiply
    12,843.36x = 17,718.48 × 8,644.32
  4. Step 4: Simplify right side
    12,843.36x = 153,164,211.03
  5. Step 5: Solve for x
    x = 153,164,211.03/12,843.36
  6. Step 6: Final answer
    x = 11,925.56

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Double 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.