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Finding the Fourth Proportional to 19,154.56, 28,728 and 5,304.96

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Solution

The fourth proportional to 19,154.56, 28,728 and 5,304.96 is: 7,956.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,154.56 : 28,728 = 5,304.96 : x
  2. Step 2: Convert to fraction form
    19,154.56/28,728 = 5,304.96/x
  3. Step 3: Cross multiply
    19,154.56x = 28,728 × 5,304.96
  4. Step 4: Simplify right side
    19,154.56x = 152,400,890.88
  5. Step 5: Solve for x
    x = 152,400,890.88/19,154.56
  6. Step 6: Final answer
    x = 7,956.38

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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.