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Finding the Fourth Proportional to 10,863.60, 16,271.10 and 8,919.60

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Solution

The fourth proportional to 10,863.60, 16,271.10 and 8,919.60 is: 13,359.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,863.60 : 16,271.10 = 8,919.60 : x
  2. Step 2: Convert to fraction form
    10,863.60/16,271.10 = 8,919.60/x
  3. Step 3: Cross multiply
    10,863.60x = 16,271.10 × 8,919.60
  4. Step 4: Simplify right side
    10,863.60x = 145,131,703.56
  5. Step 5: Solve for x
    x = 145,131,703.56/10,863.60
  6. Step 6: Final answer
    x = 13,359.45

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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.