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Finding the Fourth Proportional to 12,563.20, 18,844.80 and 11,180.80

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Solution

The fourth proportional to 12,563.20, 18,844.80 and 11,180.80 is: 16,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,563.20 : 18,844.80 = 11,180.80 : x
  2. Step 2: Convert to fraction form
    12,563.20/18,844.80 = 11,180.80/x
  3. Step 3: Cross multiply
    12,563.20x = 18,844.80 × 11,180.80
  4. Step 4: Simplify right side
    12,563.20x = 210,699,939.84
  5. Step 5: Solve for x
    x = 210,699,939.84/12,563.20
  6. Step 6: Final answer
    x = 16,771.20

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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.