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Finding the Fourth Proportional to 28,442.44, 42,678.06 and 19,189

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Solution

The fourth proportional to 28,442.44, 42,678.06 and 19,189 is: 28,793.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.44 : 42,678.06 = 19,189 : x
  2. Step 2: Convert to fraction form
    28,442.44/42,678.06 = 19,189/x
  3. Step 3: Cross multiply
    28,442.44x = 42,678.06 × 19,189
  4. Step 4: Simplify right side
    28,442.44x = 818,949,293.34
  5. Step 5: Solve for x
    x = 818,949,293.34/28,442.44
  6. Step 6: Final answer
    x = 28,793.22

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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.