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Finding the Fourth Proportional to 18,669.92, 28,007.72 and 6,355.04

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Solution

The fourth proportional to 18,669.92, 28,007.72 and 6,355.04 is: 9,533.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.92 : 28,007.72 = 6,355.04 : x
  2. Step 2: Convert to fraction form
    18,669.92/28,007.72 = 6,355.04/x
  3. Step 3: Cross multiply
    18,669.92x = 28,007.72 × 6,355.04
  4. Step 4: Simplify right side
    18,669.92x = 177,990,180.91
  5. Step 5: Solve for x
    x = 177,990,180.91/18,669.92
  6. Step 6: Final answer
    x = 9,533.53

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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.