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Finding the Fourth Proportional to 18,735.56, 28,107.44 and 7,048.78

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Solution

The fourth proportional to 18,735.56, 28,107.44 and 7,048.78 is: 10,574.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.56 : 28,107.44 = 7,048.78 : x
  2. Step 2: Convert to fraction form
    18,735.56/28,107.44 = 7,048.78/x
  3. Step 3: Cross multiply
    18,735.56x = 28,107.44 × 7,048.78
  4. Step 4: Simplify right side
    18,735.56x = 198,123,160.92
  5. Step 5: Solve for x
    x = 198,123,160.92/18,735.56
  6. Step 6: Final answer
    x = 10,574.71

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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.