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Finding the Fourth Proportional to 18,509.19, 27,763.78 and 5,361.56

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Solution

The fourth proportional to 18,509.19, 27,763.78 and 5,361.56 is: 8,042.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,509.19 : 27,763.78 = 5,361.56 : x
  2. Step 2: Convert to fraction form
    18,509.19/27,763.78 = 5,361.56/x
  3. Step 3: Cross multiply
    18,509.19x = 27,763.78 × 5,361.56
  4. Step 4: Simplify right side
    18,509.19x = 148,857,172.30
  5. Step 5: Solve for x
    x = 148,857,172.30/18,509.19
  6. Step 6: Final answer
    x = 8,042.34

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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.