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Finding the Fourth Proportional to 20,361.32, 30,480.54 and 18,414.44

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Solution

The fourth proportional to 20,361.32, 30,480.54 and 18,414.44 is: 27,566.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.32 : 30,480.54 = 18,414.44 : x
  2. Step 2: Convert to fraction form
    20,361.32/30,480.54 = 18,414.44/x
  3. Step 3: Cross multiply
    20,361.32x = 30,480.54 × 18,414.44
  4. Step 4: Simplify right side
    20,361.32x = 561,282,075.00
  5. Step 5: Solve for x
    x = 561,282,075.00/20,361.32
  6. Step 6: Final answer
    x = 27,566.09

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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.