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Finding the Fourth Proportional to 20,234.78, 30,352.10 and 7,090.90

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Solution

The fourth proportional to 20,234.78, 30,352.10 and 7,090.90 is: 10,636.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,234.78 : 30,352.10 = 7,090.90 : x
  2. Step 2: Convert to fraction form
    20,234.78/30,352.10 = 7,090.90/x
  3. Step 3: Cross multiply
    20,234.78x = 30,352.10 × 7,090.90
  4. Step 4: Simplify right side
    20,234.78x = 215,223,705.89
  5. Step 5: Solve for x
    x = 215,223,705.89/20,234.78
  6. Step 6: Final answer
    x = 10,636.33

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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.