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Finding the Fourth Proportional to 19,801.48, 29,702.22 and 7,960.64

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Solution

The fourth proportional to 19,801.48, 29,702.22 and 7,960.64 is: 11,940.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,801.48 : 29,702.22 = 7,960.64 : x
  2. Step 2: Convert to fraction form
    19,801.48/29,702.22 = 7,960.64/x
  3. Step 3: Cross multiply
    19,801.48x = 29,702.22 × 7,960.64
  4. Step 4: Simplify right side
    19,801.48x = 236,448,680.62
  5. Step 5: Solve for x
    x = 236,448,680.62/19,801.48
  6. Step 6: Final answer
    x = 11,940.96

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.