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Finding the Fourth Proportional to 19,155.66, 28,744.70 and 8,061.50

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Solution

The fourth proportional to 19,155.66, 28,744.70 and 8,061.50 is: 12,096.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,155.66 : 28,744.70 = 8,061.50 : x
  2. Step 2: Convert to fraction form
    19,155.66/28,744.70 = 8,061.50/x
  3. Step 3: Cross multiply
    19,155.66x = 28,744.70 × 8,061.50
  4. Step 4: Simplify right side
    19,155.66x = 231,725,399.05
  5. Step 5: Solve for x
    x = 231,725,399.05/19,155.66
  6. Step 6: Final answer
    x = 12,096.97

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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.