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Finding the Fourth Proportional to 18,728.20, 28,095.95 and 5,580.28

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Solution

The fourth proportional to 18,728.20, 28,095.95 and 5,580.28 is: 8,371.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.20 : 28,095.95 = 5,580.28 : x
  2. Step 2: Convert to fraction form
    18,728.20/28,095.95 = 5,580.28/x
  3. Step 3: Cross multiply
    18,728.20x = 28,095.95 × 5,580.28
  4. Step 4: Simplify right side
    18,728.20x = 156,783,267.87
  5. Step 5: Solve for x
    x = 156,783,267.87/18,728.20
  6. Step 6: Final answer
    x = 8,371.51

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.