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Finding the Fourth Proportional to 18,758.42, 28,123.71 and 11,361.23

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Solution

The fourth proportional to 18,758.42, 28,123.71 and 11,361.23 is: 17,033.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.42 : 28,123.71 = 11,361.23 : x
  2. Step 2: Convert to fraction form
    18,758.42/28,123.71 = 11,361.23/x
  3. Step 3: Cross multiply
    18,758.42x = 28,123.71 × 11,361.23
  4. Step 4: Simplify right side
    18,758.42x = 319,519,797.14
  5. Step 5: Solve for x
    x = 319,519,797.14/18,758.42
  6. Step 6: Final answer
    x = 17,033.41

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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.