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Finding the Fourth Proportional to 11,191.80, 16,779.60 and 4,614.60

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Solution

The fourth proportional to 11,191.80, 16,779.60 and 4,614.60 is: 6,918.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,191.80 : 16,779.60 = 4,614.60 : x
  2. Step 2: Convert to fraction form
    11,191.80/16,779.60 = 4,614.60/x
  3. Step 3: Cross multiply
    11,191.80x = 16,779.60 × 4,614.60
  4. Step 4: Simplify right side
    11,191.80x = 77,431,142.16
  5. Step 5: Solve for x
    x = 77,431,142.16/11,191.80
  6. Step 6: Final answer
    x = 6,918.56

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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.