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Finding the Fourth Proportional to 28,425.44, 42,652.56 and 19,172

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Solution

The fourth proportional to 28,425.44, 42,652.56 and 19,172 is: 28,767.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.44 : 42,652.56 = 19,172 : x
  2. Step 2: Convert to fraction form
    28,425.44/42,652.56 = 19,172/x
  3. Step 3: Cross multiply
    28,425.44x = 42,652.56 × 19,172
  4. Step 4: Simplify right side
    28,425.44x = 817,734,880.32
  5. Step 5: Solve for x
    x = 817,734,880.32/28,425.44
  6. Step 6: Final answer
    x = 28,767.71

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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.