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Finding the Fourth Proportional to 18,792, 28,168.80 and 8,932.32

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Solution

The fourth proportional to 18,792, 28,168.80 and 8,932.32 is: 13,389.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792 : 28,168.80 = 8,932.32 : x
  2. Step 2: Convert to fraction form
    18,792/28,168.80 = 8,932.32/x
  3. Step 3: Cross multiply
    18,792x = 28,168.80 × 8,932.32
  4. Step 4: Simplify right side
    18,792x = 251,612,735.62
  5. Step 5: Solve for x
    x = 251,612,735.62/18,792
  6. Step 6: Final answer
    x = 13,389.35

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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.