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Finding the Fourth Proportional to 28,420.44, 42,645.06 and 19,167

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Solution

The fourth proportional to 28,420.44, 42,645.06 and 19,167 is: 28,760.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.44 : 42,645.06 = 19,167 : x
  2. Step 2: Convert to fraction form
    28,420.44/42,645.06 = 19,167/x
  3. Step 3: Cross multiply
    28,420.44x = 42,645.06 × 19,167
  4. Step 4: Simplify right side
    28,420.44x = 817,377,865.02
  5. Step 5: Solve for x
    x = 817,377,865.02/28,420.44
  6. Step 6: Final answer
    x = 28,760.21

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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.