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Finding the Fourth Proportional to 18,381.20, 27,600.60 and 10,605.20

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Solution

The fourth proportional to 18,381.20, 27,600.60 and 10,605.20 is: 15,924.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.20 : 27,600.60 = 10,605.20 : x
  2. Step 2: Convert to fraction form
    18,381.20/27,600.60 = 10,605.20/x
  3. Step 3: Cross multiply
    18,381.20x = 27,600.60 × 10,605.20
  4. Step 4: Simplify right side
    18,381.20x = 292,709,883.12
  5. Step 5: Solve for x
    x = 292,709,883.12/18,381.20
  6. Step 6: Final answer
    x = 15,924.42

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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.