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Finding the Fourth Proportional to 20,134.99, 30,202.49 and 6,987.48

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Solution

The fourth proportional to 20,134.99, 30,202.49 and 6,987.48 is: 10,481.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,134.99 : 30,202.49 = 6,987.48 : x
  2. Step 2: Convert to fraction form
    20,134.99/30,202.49 = 6,987.48/x
  3. Step 3: Cross multiply
    20,134.99x = 30,202.49 × 6,987.48
  4. Step 4: Simplify right side
    20,134.99x = 211,039,294.83
  5. Step 5: Solve for x
    x = 211,039,294.83/20,134.99
  6. Step 6: Final answer
    x = 10,481.22

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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.