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Finding the Fourth Proportional to 20,003.40, 29,968.20 and 11,687.40

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Solution

The fourth proportional to 20,003.40, 29,968.20 and 11,687.40 is: 17,509.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,003.40 : 29,968.20 = 11,687.40 : x
  2. Step 2: Convert to fraction form
    20,003.40/29,968.20 = 11,687.40/x
  3. Step 3: Cross multiply
    20,003.40x = 29,968.20 × 11,687.40
  4. Step 4: Simplify right side
    20,003.40x = 350,250,340.68
  5. Step 5: Solve for x
    x = 350,250,340.68/20,003.40
  6. Step 6: Final answer
    x = 17,509.54

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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.