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Finding the Fourth Proportional to 20,350.35, 30,478.14 and 19,789.80

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Solution

The fourth proportional to 20,350.35, 30,478.14 and 19,789.80 is: 29,638.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.35 : 30,478.14 = 19,789.80 : x
  2. Step 2: Convert to fraction form
    20,350.35/30,478.14 = 19,789.80/x
  3. Step 3: Cross multiply
    20,350.35x = 30,478.14 × 19,789.80
  4. Step 4: Simplify right side
    20,350.35x = 603,156,294.97
  5. Step 5: Solve for x
    x = 603,156,294.97/20,350.35
  6. Step 6: Final answer
    x = 29,638.62

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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.