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Finding the Fourth Proportional to 28,438.44, 42,672.06 and 19,185

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Solution

The fourth proportional to 28,438.44, 42,672.06 and 19,185 is: 28,787.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.44 : 42,672.06 = 19,185 : x
  2. Step 2: Convert to fraction form
    28,438.44/42,672.06 = 19,185/x
  3. Step 3: Cross multiply
    28,438.44x = 42,672.06 × 19,185
  4. Step 4: Simplify right side
    28,438.44x = 818,663,471.10
  5. Step 5: Solve for x
    x = 818,663,471.10/28,438.44
  6. Step 6: Final answer
    x = 28,787.21

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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.