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Finding the Fourth Proportional to 18,218.60, 27,328.62 and 5,072.12

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Solution

The fourth proportional to 18,218.60, 27,328.62 and 5,072.12 is: 7,608.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,218.60 : 27,328.62 = 5,072.12 : x
  2. Step 2: Convert to fraction form
    18,218.60/27,328.62 = 5,072.12/x
  3. Step 3: Cross multiply
    18,218.60x = 27,328.62 × 5,072.12
  4. Step 4: Simplify right side
    18,218.60x = 138,613,878.07
  5. Step 5: Solve for x
    x = 138,613,878.07/18,218.60
  6. Step 6: Final answer
    x = 7,608.37

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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.