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Finding the Fourth Proportional to 18,021.25, 27,027.12 and 12,397.74

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Solution

The fourth proportional to 18,021.25, 27,027.12 and 12,397.74 is: 18,593.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,021.25 : 27,027.12 = 12,397.74 : x
  2. Step 2: Convert to fraction form
    18,021.25/27,027.12 = 12,397.74/x
  3. Step 3: Cross multiply
    18,021.25x = 27,027.12 × 12,397.74
  4. Step 4: Simplify right side
    18,021.25x = 335,075,151.85
  5. Step 5: Solve for x
    x = 335,075,151.85/18,021.25
  6. Step 6: Final answer
    x = 18,593.33

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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.