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Finding the Fourth Proportional to 11,191.90, 16,751.40 and 8,980.60

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Solution

The fourth proportional to 11,191.90, 16,751.40 and 8,980.60 is: 13,441.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,191.90 : 16,751.40 = 8,980.60 : x
  2. Step 2: Convert to fraction form
    11,191.90/16,751.40 = 8,980.60/x
  3. Step 3: Cross multiply
    11,191.90x = 16,751.40 × 8,980.60
  4. Step 4: Simplify right side
    11,191.90x = 150,437,622.84
  5. Step 5: Solve for x
    x = 150,437,622.84/11,191.90
  6. Step 6: Final answer
    x = 13,441.65

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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.