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Finding the Fourth Proportional to 19,325.92, 28,815.78 and 18,976

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Solution

The fourth proportional to 19,325.92, 28,815.78 and 18,976 is: 28,294.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,325.92 : 28,815.78 = 18,976 : x
  2. Step 2: Convert to fraction form
    19,325.92/28,815.78 = 18,976/x
  3. Step 3: Cross multiply
    19,325.92x = 28,815.78 × 18,976
  4. Step 4: Simplify right side
    19,325.92x = 546,808,241.28
  5. Step 5: Solve for x
    x = 546,808,241.28/19,325.92
  6. Step 6: Final answer
    x = 28,294.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.