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Finding the Fourth Proportional to 20,593.95, 30,890.21 and 8,740.11

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Solution

The fourth proportional to 20,593.95, 30,890.21 and 8,740.11 is: 13,109.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,593.95 : 30,890.21 = 8,740.11 : x
  2. Step 2: Convert to fraction form
    20,593.95/30,890.21 = 8,740.11/x
  3. Step 3: Cross multiply
    20,593.95x = 30,890.21 × 8,740.11
  4. Step 4: Simplify right side
    20,593.95x = 269,983,789.62
  5. Step 5: Solve for x
    x = 269,983,789.62/20,593.95
  6. Step 6: Final answer
    x = 13,109.86

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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.