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Finding the Fourth Proportional to 8,729.86, 13,094.79 and 7,187.62

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Solution

The fourth proportional to 8,729.86, 13,094.79 and 7,187.62 is: 10,781.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,729.86 : 13,094.79 = 7,187.62 : x
  2. Step 2: Convert to fraction form
    8,729.86/13,094.79 = 7,187.62/x
  3. Step 3: Cross multiply
    8,729.86x = 13,094.79 × 7,187.62
  4. Step 4: Simplify right side
    8,729.86x = 94,120,374.50
  5. Step 5: Solve for x
    x = 94,120,374.50/8,729.86
  6. Step 6: Final answer
    x = 10,781.43

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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.