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Finding the Fourth Proportional to 8,728.36, 13,092.54 and 7,186.12

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Solution

The fourth proportional to 8,728.36, 13,092.54 and 7,186.12 is: 10,779.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.36 : 13,092.54 = 7,186.12 : x
  2. Step 2: Convert to fraction form
    8,728.36/13,092.54 = 7,186.12/x
  3. Step 3: Cross multiply
    8,728.36x = 13,092.54 × 7,186.12
  4. Step 4: Simplify right side
    8,728.36x = 94,084,563.54
  5. Step 5: Solve for x
    x = 94,084,563.54/8,728.36
  6. Step 6: Final answer
    x = 10,779.18

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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.