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Finding the Fourth Proportional to 18,010.20, 27,039.60 and 11,449.20

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Solution

The fourth proportional to 18,010.20, 27,039.60 and 11,449.20 is: 17,189.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,010.20 : 27,039.60 = 11,449.20 : x
  2. Step 2: Convert to fraction form
    18,010.20/27,039.60 = 11,449.20/x
  3. Step 3: Cross multiply
    18,010.20x = 27,039.60 × 11,449.20
  4. Step 4: Simplify right side
    18,010.20x = 309,581,788.32
  5. Step 5: Solve for x
    x = 309,581,788.32/18,010.20
  6. Step 6: Final answer
    x = 17,189.25

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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.