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Finding the Fourth Proportional to 19,890.90, 29,793.15 and 17,298.90

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Solution

The fourth proportional to 19,890.90, 29,793.15 and 17,298.90 is: 25,910.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.90 : 29,793.15 = 17,298.90 : x
  2. Step 2: Convert to fraction form
    19,890.90/29,793.15 = 17,298.90/x
  3. Step 3: Cross multiply
    19,890.90x = 29,793.15 × 17,298.90
  4. Step 4: Simplify right side
    19,890.90x = 515,388,722.54
  5. Step 5: Solve for x
    x = 515,388,722.54/19,890.90
  6. Step 6: Final answer
    x = 25,910.78

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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.