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Finding the Fourth Proportional to 18,605.12, 27,912.52 and 8,224.16

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Solution

The fourth proportional to 18,605.12, 27,912.52 and 8,224.16 is: 12,338.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.12 : 27,912.52 = 8,224.16 : x
  2. Step 2: Convert to fraction form
    18,605.12/27,912.52 = 8,224.16/x
  3. Step 3: Cross multiply
    18,605.12x = 27,912.52 × 8,224.16
  4. Step 4: Simplify right side
    18,605.12x = 229,557,030.48
  5. Step 5: Solve for x
    x = 229,557,030.48/18,605.12
  6. Step 6: Final answer
    x = 12,338.38

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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.