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Finding the Fourth Proportional to 18,907.92, 28,363.82 and 7,230.96

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Solution

The fourth proportional to 18,907.92, 28,363.82 and 7,230.96 is: 10,847.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.92 : 28,363.82 = 7,230.96 : x
  2. Step 2: Convert to fraction form
    18,907.92/28,363.82 = 7,230.96/x
  3. Step 3: Cross multiply
    18,907.92x = 28,363.82 × 7,230.96
  4. Step 4: Simplify right side
    18,907.92x = 205,097,647.87
  5. Step 5: Solve for x
    x = 205,097,647.87/18,907.92
  6. Step 6: Final answer
    x = 10,847.18

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1.5x scale

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.