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Finding the Fourth Proportional to 18,907.92, 28,361.94 and 5,760.24

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Solution

The fourth proportional to 18,907.92, 28,361.94 and 5,760.24 is: 8,640.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.92 : 28,361.94 = 5,760.24 : x
  2. Step 2: Convert to fraction form
    18,907.92/28,361.94 = 5,760.24/x
  3. Step 3: Cross multiply
    18,907.92x = 28,361.94 × 5,760.24
  4. Step 4: Simplify right side
    18,907.92x = 163,371,581.27
  5. Step 5: Solve for x
    x = 163,371,581.27/18,907.92
  6. Step 6: Final answer
    x = 8,640.38

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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.