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Finding the Fourth Proportional to 8,728.30, 13,092.45 and 5,229.10

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Solution

The fourth proportional to 8,728.30, 13,092.45 and 5,229.10 is: 7,843.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.30 : 13,092.45 = 5,229.10 : x
  2. Step 2: Convert to fraction form
    8,728.30/13,092.45 = 5,229.10/x
  3. Step 3: Cross multiply
    8,728.30x = 13,092.45 × 5,229.10
  4. Step 4: Simplify right side
    8,728.30x = 68,461,730.30
  5. Step 5: Solve for x
    x = 68,461,730.30/8,728.30
  6. Step 6: Final answer
    x = 7,843.65

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Half scale
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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.