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Finding the Fourth Proportional to 8,861.78, 13,292.68 and 8,320.49

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Solution

The fourth proportional to 8,861.78, 13,292.68 and 8,320.49 is: 12,480.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.78 : 13,292.68 = 8,320.49 : x
  2. Step 2: Convert to fraction form
    8,861.78/13,292.68 = 8,320.49/x
  3. Step 3: Cross multiply
    8,861.78x = 13,292.68 × 8,320.49
  4. Step 4: Simplify right side
    8,861.78x = 110,601,611.01
  5. Step 5: Solve for x
    x = 110,601,611.01/8,861.78
  6. Step 6: Final answer
    x = 12,480.75

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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.