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Finding the Fourth Proportional to 20,005.80, 29,994.30 and 11,243.40

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Solution

The fourth proportional to 20,005.80, 29,994.30 and 11,243.40 is: 16,857.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.80 : 29,994.30 = 11,243.40 : x
  2. Step 2: Convert to fraction form
    20,005.80/29,994.30 = 11,243.40/x
  3. Step 3: Cross multiply
    20,005.80x = 29,994.30 × 11,243.40
  4. Step 4: Simplify right side
    20,005.80x = 337,237,912.62
  5. Step 5: Solve for x
    x = 337,237,912.62/20,005.80
  6. Step 6: Final answer
    x = 16,857.01

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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.