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Finding the Fourth Proportional to 10,863.60, 16,266.60 and 8,559.60

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Solution

The fourth proportional to 10,863.60, 16,266.60 and 8,559.60 is: 12,816.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,863.60 : 16,266.60 = 8,559.60 : x
  2. Step 2: Convert to fraction form
    10,863.60/16,266.60 = 8,559.60/x
  3. Step 3: Cross multiply
    10,863.60x = 16,266.60 × 8,559.60
  4. Step 4: Simplify right side
    10,863.60x = 139,235,589.36
  5. Step 5: Solve for x
    x = 139,235,589.36/10,863.60
  6. Step 6: Final answer
    x = 12,816.71

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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.