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Finding the Fourth Proportional to 20,093.50, 30,140.25 and 7,781.50

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Solution

The fourth proportional to 20,093.50, 30,140.25 and 7,781.50 is: 11,672.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,093.50 : 30,140.25 = 7,781.50 : x
  2. Step 2: Convert to fraction form
    20,093.50/30,140.25 = 7,781.50/x
  3. Step 3: Cross multiply
    20,093.50x = 30,140.25 × 7,781.50
  4. Step 4: Simplify right side
    20,093.50x = 234,536,355.38
  5. Step 5: Solve for x
    x = 234,536,355.38/20,093.50
  6. Step 6: Final answer
    x = 11,672.25

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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.