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Finding the Fourth Proportional to 11,487.12, 17,230.80 and 9,193.20

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Solution

The fourth proportional to 11,487.12, 17,230.80 and 9,193.20 is: 13,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,487.12 : 17,230.80 = 9,193.20 : x
  2. Step 2: Convert to fraction form
    11,487.12/17,230.80 = 9,193.20/x
  3. Step 3: Cross multiply
    11,487.12x = 17,230.80 × 9,193.20
  4. Step 4: Simplify right side
    11,487.12x = 158,406,190.56
  5. Step 5: Solve for x
    x = 158,406,190.56/11,487.12
  6. Step 6: Final answer
    x = 13,789.90

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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.