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Finding the Fourth Proportional to 19,010.69, 28,520.89 and 7,913.69

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Solution

The fourth proportional to 19,010.69, 28,520.89 and 7,913.69 is: 11,872.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,010.69 : 28,520.89 = 7,913.69 : x
  2. Step 2: Convert to fraction form
    19,010.69/28,520.89 = 7,913.69/x
  3. Step 3: Cross multiply
    19,010.69x = 28,520.89 × 7,913.69
  4. Step 4: Simplify right side
    19,010.69x = 225,705,481.98
  5. Step 5: Solve for x
    x = 225,705,481.98/19,010.69
  6. Step 6: Final answer
    x = 11,872.56

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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.