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Finding the Fourth Proportional to 19,292.45, 28,939.80 and 7,446.29

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Solution

The fourth proportional to 19,292.45, 28,939.80 and 7,446.29 is: 11,169.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,292.45 : 28,939.80 = 7,446.29 : x
  2. Step 2: Convert to fraction form
    19,292.45/28,939.80 = 7,446.29/x
  3. Step 3: Cross multiply
    19,292.45x = 28,939.80 × 7,446.29
  4. Step 4: Simplify right side
    19,292.45x = 215,494,005.62
  5. Step 5: Solve for x
    x = 215,494,005.62/19,292.45
  6. Step 6: Final answer
    x = 11,169.86

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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.