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Finding the Fourth Proportional to 19,206.56, 28,812.18 and 5,355.56

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Solution

The fourth proportional to 19,206.56, 28,812.18 and 5,355.56 is: 8,033.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,206.56 : 28,812.18 = 5,355.56 : x
  2. Step 2: Convert to fraction form
    19,206.56/28,812.18 = 5,355.56/x
  3. Step 3: Cross multiply
    19,206.56x = 28,812.18 × 5,355.56
  4. Step 4: Simplify right side
    19,206.56x = 154,305,358.72
  5. Step 5: Solve for x
    x = 154,305,358.72/19,206.56
  6. Step 6: Final answer
    x = 8,033.99

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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.