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Finding the Fourth Proportional to 18,428.09, 27,620.27 and 10,620.77

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Solution

The fourth proportional to 18,428.09, 27,620.27 and 10,620.77 is: 15,918.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.09 : 27,620.27 = 10,620.77 : x
  2. Step 2: Convert to fraction form
    18,428.09/27,620.27 = 10,620.77/x
  3. Step 3: Cross multiply
    18,428.09x = 27,620.27 × 10,620.77
  4. Step 4: Simplify right side
    18,428.09x = 293,348,481.90
  5. Step 5: Solve for x
    x = 293,348,481.90/18,428.09
  6. Step 6: Final answer
    x = 15,918.55

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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.